Gabriela needs to find the cosine of . If she knows that cos=, how can she use the double angle formula to find cos Show what she would do.

Q: Use an appropriate Half-Angle Formula to find the exact value of the expression. sin(15°)

A:

Q: Use the cofunction identities to find an angle θ that makes the statement true.sin θ = cos (4θ +…

A: From the given statement

Q: Give the answer to the trig function and the quadrant where the angle terminates. 47t sin 3 %3D

A:

Q: Starting from J, the third member ran the direction similar as the second did. At what point did the…

A: There are 12 letters, hence, distance between any two letters  =  (2π) ÷ 12  =  π/6 rad    And…

Q: A student uses a protractor to measure an angle to be 0 = 85° ± 1°. What should she report for sin 0…

A: We know that, the uncertainty in sin(θ) can be found either from half the difference between the…

Q: If 0s0<360°,then use your calculator and the reference angle to find two values when cos 0 =-0.4568

A:

Q: Answer 7 find sin,Cos,missing side and angle tangent

A: Given,

Q: For an acute angle θ, the equation sin(θ) = cos(84) is true. What is the value of θ?

A: The equation is given by sinθ = cos84° Where θ is an acute angle To evaluate : The value of θ

Q: In terms of the cosine of a positive acute angle, what is the expression for cos(19pie/18)?

A: Cos 19π/18                     = cos 19*180/18                    = cos 190° cos190° = -0.98481cos…

Q: To explain why it is possible to find an angle theta that will maketan theta as large as we wish.

A: It is known that tanθ=Opposite sideAdjacent side and the range of tanθ is -∞,∞. when θ→0 then tanθ→0…

Q: What will be the time be if the clock covered a distance of -4π3 radians? What is the measure of the…

A: Measure of the angle formed.

Q: Find sin (2)dr (hint: use a half-angle formula twice).

A: Note: sin2x=2sinxcosx  Cos2x=1-2sin^2(x) And sin^2(x)+cos^2(x)=1 by using these formulas we solve…

Q: For positive acute angles A and B, it is known that cos  A = 40/41 and tan B=5/12. Find the value of…

A:

Q: Use the half-angle formula to simplify the given expression. 1 + cos 12x 2

A: The given expression is:1+cos12x2We need to simplify the above expression using half-angle formula.

Q: The hypotenuse of a right triangle is 5 units and one angle is 0.6 radian. Determine the length of…

A: Given:           Length of hypotenuse = 5 units.One angle is 0.6 radians.

Q: To explain why, for any acute angle u, it is impossible for cos theta =  3.

A: we know that range of cosθ is -1 to 1 so, value of cosθ can't be equal to 3

Q: when the axes are related through an angle a ,find the trafsformed equation of x cos a +y sina =p

A: The given equation is: x cos a+y sin a=p to rotate the equation through an angle a.

Q: Find the exact value using half-angle formulas. 7 cos(7π/8)

A: Recall the following facts.

Q: Find the value of the Sine, Cosine, Cosecant and Secant, if 0= 225°. What is the reference angle of…

A: Given unit circle with angle θ=225°

Q: A light truck with manual transmission has a circular brake drum with a diameter of d = 300…

A: Diameter = 300 mm  So radius=r= diameter/2= 300/2= 150 mm Given that arc length = s = 296 mm  In…

Q: What is the reference angle associated with cos 240o ?

A: Answer is- -1/2 Explanation is given below....

Q: Here is a right triangle. Explain why the equation cos(A) sin(C) is valid. A

A: Given that:   A right angle triangle, Angle B =90 degree

Q: Find the missing angle: cos(π/6)=sin(___)

A: Given information

Q: snip

A: For any triangle we have to derive the formula: a=b cos C+c cos B We know sine rule, asin A=bsin…

Q: Given any triangle, there are two cases when the sine law can be used. Determine the scenarios when…

A: Sine Rule: Sine law can be used when two sides and one angle opposite to any of given side is given.…

Q: The sum of the sines of two angles A and B is 3/2 while the sum of the cosines of the angles is √3…

A: Given  Sin(A)+Sin(B)=3/2 Cos(A)+Cos(B)=(3^(1/2))/2

Q: Which of the 3 trigonometry functions has the largest value when evaluating angle A? (sin A,cos A ,…

A: Explanation of the answer is as follows

Q: If the terminal arm of an angle θ, in standard position, lies on the left side of the y-axis than…

A: cos θ=

Q: Find an angle θθwith 0∘< θ < 360∘that has the same: Sine as 40∘: θ = ___ degrees Cosine as 40∘: θ…

A: We need to find the same angle between 00&lt;θ&lt;3600.

Q: What is the value of cos(6) if the terminal side of the angle 0 intersects a circle at the point…

A: It can be solved using the fact that cose angle is adjacent/hypotenuse

Q: Find the exact value of cos if a is the angle in the diagram below. 2

A: Here we have to find the exact value of cosα2=?

Q: A light truck with manual transmission has a circular brake drum with a diameter of d = 300…

A: Given that the diameter= d= 300 millimeters So the radius=r= 3002=150 millimeters Given that the arc…

Q: Use the appropriate compound angle formula to find the exact value of cos 3

A:

Q: Find a cofunction with the same value as sec(π/4). Write your answer below with the angle expressed…

A: Cofunction for sec function (in degrees) is: Cofunction for sec function (in radians) is: The…

Q: If θ is an acute angle and cos θ = 1/3, find csc (π/2 - θ).

A: It is given that,cos θ = 1/3 We have to find  csc (π/2 - θ).

Q: If 0s0<360°,then use your calculator and the reference angle to find two 0 values when cos 0…

A:

Q: Find the cosine of the angle of separation between a = (1, 1, 2) and b = (-2, 1, 5). cos (a) =???…

A:

Q: What Will be the time be if the clock covered a distance of-4π/3 radians? What is the measure of the…

A:

Q: For an acute angle θ, the equation sin θ = cos(52) is true. What is the value of θ

A:

Q: find the missing angle: cos (pi /6 ) = sin (_ )

A: By trigonometric identitycosθ=sin(π2-θ)cos(π6)=sin(π2-π6)cos(π6)=sin(π3)

Q: What is cos 2A, if cos 2A = 5/8, and 2A is an angle in the fourth quadrant?

A:

Q: Use a half-angle formula to find cos 75 degree.

A: We have to find exact value of cos 75° by using half angle formula. We know half angle formula for…

Q: Use an appropriate Half-Angle Formula to find the exact value of the expression. COS

A: We can answer the question as below using half angle formula.

Q: Suppose that the cosine of an an angle is negative and that you found one solution in quadrant III.…

A: Cosine value  is negative in the quadrant II and III.

Q: Suppose cos 2A and 2A is an angle in the First Quadrant. 9. Then cos A %3D

A: We know that 1+cos2x = 2cos2x ⇒cosx=±1+cos2x2 Sign will be according to quadrant in which x belongs…

Q: Suppose that is an angle in quadrant 2 and that - 119 cos y = Compute the exact value of cos - 169…

A: here we have to find the value of half angle. the solution is following.