Simplify the expression by using a double-angle formula. cos 30 – sin 30

Q: Nadia was asked to show that the sine of an angle and the cosine of its complement are equal. To do…

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Q: Rewrite the expression as a sum or difference, then simplify if possible. 10 sin 6x cos 4x

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Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. 1- cos(40°) (a) 2…

A: The double angle formula states that sinθ=±1-cos2θ2..

Q: Simplify each trigonometric expression by following the indicated direction.

A: Given

Q: Rewrite the expression as a sum or difference, then simplify if possible. 8 sin 7x cos 3x

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Q: Rewrite the expression as a sum or difference, then simplify if possible. 6 sin 8x cos 4x

A: Formula is as below :

Q: Simplify the expression by using a double-angle formula. 2 tan 4 2 1- tan 4 |sin| ]cos[ |tan |cot|…

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Q: Rewrite the expression as a sum or difference, then simplify if possible. 4 sin 6x cos 2x

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Q: Simplify the expression sin (cos (300)), where the angle is measured in degrees. Do not include the…

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Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. sin 6° (a) 1 + cos…

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Q: 6. Write the given expression as the cosine of an angle. cos(90°) cos(20°) – sin(90°) sin(20°)

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Q: Find the exact value of the following expression. - 1 cos (-1/2) In which quadrant is this angle?

A: We know that,

Q: Write the expression as the sine, cosine, or tangent of an angle. sin 70° cos 5° + cos 70° sin 5°

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Q: Find the exact value of the expression in terms of xwith the help of a reference triangle. Draw the…

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Q: Write the expression as the sine, cosine, or tangent of an angle. tan(7/15) + tan(4z/5) 1 –…

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Q: Simplify the expression sin 29.5° cos 29.5°. 8

A: Given18sin(29.5°)cos(29.5°)we know that double angle identitiessin(2θ)=2sinθ.cosθ

Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. 2 tan(9°) (a) 1-…

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Q: Simplify, using the double-angle formulas: 1- 2 sin2(15°)

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Q: Write the following in terms of sin ? and cos ?; then simplify if possible. (Leave your answer in…

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Q: If tan pi/8 = (sqrt A) - B   then, by using a half-angle formula, find A=??  B=??

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Q: 1 - cos(40) 2

A: We have to simplify the expression  1 - cos4θ2.

Q: Write the expression as the sine, cosine, or tangent of an angle. 3 COS sin)sin() COS - 7

A: Note that: cos x cos y-sin x sin y=cos (x+y)

Q: Simplify the expression by using a double-angle formula. 2 cos 20 – 1

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Q: Write the expression as the sine, cosine, or tangent of an angle. Then find the exact value of the…

A: Given sin5π12cosπ4-cos5π12sinπ4 Take sin5π12cosπ4                      ⇒sin5 × 18012 . cos1804⇒sin75…

Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula 1- cos(60°) (a) 2 1…

A: We need that half angle formula on the board.

Q: Write the expression as the sine, cosine, or tangent of an angle. cos 140° cos 20° – sin 140° sin…

A: Given expression is cos140°cos20°-sin40°sin20° we have to write the expression as the sine , cosine…

Q: Simplify the expression by using a double-angle formula. 2 cos 27°-1

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Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula (a) 2 tan…

A: To simplify the following parts.

Q: sin 75°

A: Using Half angle formula, Half angle formula tor sine issinx2=1-cosx2

Q: Write the given expression as the sine or cosine of an angle. cos 55° cos 30° + sin 55° sin 30° O…

A: NOTE: Refresh your page if you can't see any equations. .

Q: Write the expression as sin, cosine, or tangent of an angle cos( 5pi/7)…

A: Consider to given trigonometric expression, cos5π7cos2π5-sin5π7sin2π5 Use the trigonometric…

Q: Write the following expression as the​ sine, cosine, or tangent of a double angle. Then find the…

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Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a) 2 sin(18°)…

A: In this question we will use basic of trigonometry i.e sin2θ=2sinθcosθ In first question we will put…

Q: If the given values in a right triangle are cos A = * and a = 2, find the hypotenuse c %3D 2/2 3 c.…

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Q: Write the expression as the sine, cosine, or tangent of an angle. sin 70° cos 10° + cos 70° sin 10°

A: Given expression is sin70° cos10°+cos70° sin10°. To write the expression as the sine, cosine or…

Q: Write the expression as the sine, cosine, or tangent of an angle cos 140° cos 50° – sin 140° sin 50°

A: Formula:

Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a) cos (36°) –…

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Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a)    cso^2( θ…

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Q: For the angle 300°, find the reference angle, the quadrant of the terminal side, and the exact value…

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Q: Use a double-angle identity to simplify the following expression. Зл 1 – 2 sin?

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Q: Use the formula for the cosine of the difference of two angles to find the exact value of expression…

A: We have formula, cosA-B=cosA cosB+sinA sinB. Using above formula, we will evaluate the expression…

Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a) cos? 38° - sin?…

A: Since you have asked multiple questions in a single request, we would be answering only the first…

Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. (a) 2 sin(18°)…

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Q: Use a double-angle formula to rewrite the expression. 6 cos? x - 3

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Q: Write the expression as the sine, cosine, or tangent of an angle. sin cos 7 cos 5 sin 5

A: Consider the given expression as, E=cos4π7cos7π5-sin4π7sin7π5 Consider the required formulae,…

Q: Use a half-angle formula or sum and difference formula to find the exact value of the expression.…

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Q: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. 1- cos(30°) 2 (a) 1…

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Q: Write the expression as the sine, cosine, or tangent of an angle. sin 3 cos 1.2 - cos 3 sin 1.2

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