Find cos 20 if sin 0 = cos 20

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Q: Find the exact value of the expression.

A: Our Aim is to find the exact value of the expression given below:-

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A: We will find the value of cos(-5π4) .Below find the solution in the image.

Q: . Evaluate cos 0 if sin 0 = -1/4 and 0 is in quadrant II

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Q: Find cos θ if  sin θ =  1 2  and θ terminates in QII.

A: Assume sinθ=12⇒θ=sin12-1⇒θ=30° , 150°

Q: Find two exact values of θ in degrees (0° ≤ θ < 360°) for which cos θ = −√32.Do not use a…

A: Given information: cosθ=-32, 0≤θ≤360° Calculation: The cosine function is negative in second and…

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Q: Find the exact value of cos(83°) cos(23°) + sin(83°) sin(23°)

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

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Q: Find the exact value of cos 70° cos 40° + sin 70° sin 40°.

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Q: Find cos2θ if sinθ=7/25

A: From the given information, sin ϴ = 7/ 25.Known fact,  cos 2ϴ = 1 - 2 sin2 ϴ.

Q: Find the exact value of tan (2 cos-1

A: We can solve the problem by applying trigonometric ratio.

Q: Hence or otherwise find the exact value of 2 sin 285 cos 45

A: Given  To find exact value of 2sin285 cos 45   Using formula

Q: Find the exact value of cos150°∙tan330°∙sin240°

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Q: Find cos (20) if sin 0= 8. cos 0>0 17

A: Given : sin θ=817Opposite side to θ is 8hypotenuse is 17 Now use Pythagorean theorem to find the…

Q: Evaluate cos (sin + cos 2

A: We use the identity sin-1x+cos-1x=π/2

Q: Find sin0 & cos 0 if give 7 and 90°<0 <180°. 12 cos 20 =

A: 90°&lt;θ&lt;180°    then sin θ = + ve    cosθ = - ve

Q: Find sin 2x, cos 2.x, and tan 2x if cosx 2 and x terminates in quadrant II.

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Q: Find the exact value of (sin 14°)2 + (cos 14°)2 - 3

A: Given expression: sin 14∘2+cos 14∘2-3 The objective is to find the exact value of sin 14∘2+cos…

Q: If 0° < 0 < 90° and sin 0 = find cos 20.

A: Here the angle lies in the first quadrant and value of sin is given. So to find the Value of cos…

Q: find the exact value of cos 227 cos 167 + sin 227 sin 167 by using the formula for cos (a-b).

A: Solution :       We have to find the exact value by using the formula for cos(a - b)  = ? Now, Given…

Q: Find the exact value of cos215° - sin215°.

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Q: Use trigonometric identities to solve cos(2θ)−cos(θ)=0 exactly for 0∘≤θ&lt;360∘

A: Given equation,

Q: 3n 8 If tan 0= find the exact value of each of the following. 2 cos (20)

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Q: Find the value of cos 1- + 2 sin 1/2

A: value=?

Q: Find cos θ and sin θ if tan θ = 4 and π ≤ θ &lt; 3π/2

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Q: Find the exact value of cos20 given sin0 =- and 0 < 0 < 13

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Q: Evaluate cos 2 cos 7x without using a calculator. (Assume x>0.) |

A: given that cos( 2cos-1 7x) and we simply this here x&gt;0 . Here i attached solution of this…

Q: Find the exact value of cos(20)-

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Q: 7. Give the exact answer for cos ( sin- 13

A: Consider the given expression

Q: Find sin(2θ) if cosθ=− 1/3 and θ is in QII.

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Q: Find the exact value of( sin 14°) +(cos 14°) 2 -3. Graph y=3sin(2x).

A: Given :               sin 14°2 + cos 14°2 - 3    To find :  The exact value of the given expression.…

Q: If sin18 = 0.309, determine the value of cos 72

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Q: 5n 25) cos 12 + sin sin 12 12 cos 12

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Q: Find the exact value of cos 20 if cos 0 and 0 lies in QII %3D

A: cos2θ = 2cos2θ - 1          =2(-13)2 - 1          =29 - 1          =-79

Q: Find the exact values of cos 0 if sin 0 * and sec 0 > 0 13

A: Given:sin θ =-513 and sec θ &gt;0

Q: Find cos 20 if sin 0 %3D cos 20 = %3D

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Q: Find the exact value of expression.

A: we have to find the exact value of given expression                cos-122

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Q: Give the exact value of cos 3 (플),

A: Answer is Cos2x/3= -1/2.

Q: Find the exact value. sin(570°) = %3D cos (570°) % = COS

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Q: 15. Evaluate [sin50 cos²0de. COS

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Q: Give exact values for cos 30°, sin 30°, cos 60°, sin 60°, cos 90°,and sin 90°.

A: Exacts values  for  a)  cos 30° b) sin 30° c) cos 60° d) sin 60° e) cos 90°,and f) sin 90°.

Q: If cos(theta) = -1/3, and theta terminates in QIII, find cos(theta) and tan(theta)

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Q: Find the exact value of cos(2 tan−¹(-52)). .7041 X

A: Solving the problem by finding the value of the expression.

Q: What is the exact value of sin(67.5°)cos(22.5°)?

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Q: Find the exact value of the expression. sin293° cos 23° – cos293° sin23°

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