Find the exact value of cos 45°.

Q: Find the exact value

A: To evaluate cos (67.5 degrees) exactly (without calculator or tables)

Q: Determine the value of each angle to the nearest degree  Cos B = 0.9823

A: Given, cos B = 0.9823

Q: draw the reference angle of cos(-330)

A:

Q: using the appropriate half angle formula, find the exact value of cos 22.5

A: Find the exact value of

Q: Find the exact value of sec 52° cos 308°

A: As value of cosθ and sinθ revolves around +1 to -1 , they take different values depending on the…

Q: Use half-angle formulas to find exact values for the following. cos (75°)=______________

A: Firstly, we evaluate value of cos 150 degrees.

Q: Use an appropriate Half-Angle Formula to find the exact value of the expression. cos 8

A: Explained below

Q: Find the exact value of the expression. cos 29

A: Simplification

Q: Use a calculator to approximate each value to four decimal places.             cos 10

A:

Q: Find the exact value of each expression.

A: Given: y=cos5π4 We know that cosπ+θ=-cosθ                                                        ..1

Q: Use half-angle formula to find exact value of cos 15°

A: Given,          cos15°We know that,         cosθ2=1+cosθ2

Q: Find the exact value of cos(37.5◦).

A:

Q: What is cos 12 degrees to the nearest tenth?

A: so nearest tenth place is 7.

Q: What is the exact value of cos⁡15∘?

A: According to the given information, it is required to find the exact value of cos(15).

Q: Use a reference angle to write cos(260∘) in terms of the cosine of a positive acute angle.

A:

Q: When figuring out this question, what would be the radians value, with 4pi/3?

A: The table of signs of different ratios in the quadrants is as shown below. II    only sin +ve I…

Q: The period of the function y = cos 30 in radians is ㅇ쯤 을

A: The given function is;  y=Cos(3 theta).

Q: Find the exact value of cot (cos^-1 (-4/7))

A: As we know that sinx=1-cos2x   and cotx=cosxsinx

Q: Use an appropriate Half-Angle Formula to find the exact value of the expression. cos(112.5°)

A: Solving the problem by half angle formula.

Q: Find cos(2A), if cos(A) = - 45/53, and A is in quadrant 2.

A: Given : cos A = -4553and A is in quadrant 2    To Find: cos2A

Q: Use half-angle formula to find exact value of cos 15°.

A:

Q: Find the quadrant in which θ lies from the information given. csc(θ) < 0   and   cos(θ) < 0

A:

Q: Use a reference angle to find the exact value of cos 210 degree        -1/2

A: Let the given cosing angle be y - y = cos210Angle 210° lies in the third quadrant.So, we can take…

Q: Use the figure to find the exact value of the following trigonometric function. 12 cos (20)

A:

Q: Determine the exact value of cos 12

A: Given,          cos7π12

Q: Find the exact value of cos 285° by using sum or difference formula

A: Given : cos285°

Q: Find the exact value of cos 105° by using a sum or difference formula.

A:

Q: Find the exact radian solutions of the equation in the interval 0,27). cos 20 = 5 cos 0 – 3

A: Explanation of the answer is as follows

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: Find cos(2A), if cos(A) 40 and A is in quadrant 3. 41

A: To determine the value of cos (2A).

Q: Write cos(0) in terms of sin(0) if 0 is an angle in quadrant II.

A:

Q: Find cos(2A), if sin(A) = 45 53' and A is in quadrant 3.

A:

Q: Find the exact value by using a half-angle identity.  cos(5pi/12)

A:

Q: Use an appropriate Half-Angle Formula to find the exact value of the expression. cos (2)

A:

Q: Find cos(2A), if sin(A) and A is in quadrant 3. 41

A:

Q: Find an exact value for cos(75 degrees)

A: Given: The trigonometric angle cos75° To find: The exact value of cos75°.

Q: Complete the formula for the law of cosines: cos A = _________

A: To determine: Complete the formula for the law of cosines: cos A = _________

Q: Find cos(20) if tan 0and 0 is in Quadrant I.

A:

Q: Find the exact value

A: Given information:The given expression is .

Q: Find the value of cos Q rounded to the nearest hundredth, if necessary. Q 21 10 P.

A: cos θ = adjacent sidehypotenuse

Q: Use a half-angle formula to find the exact value of the expression cos 157.5°

A:

Q: Use a half-angle formula to find the exact value of cos 22.5°.

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: What is the first step in finding the exact value of cos 495 degree ?

A: We have to determine the value of term cos495°. Since, angle θ=495° is more than 360°, therefore the…

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: Find the exact value of cos(105°).

A: This question is related to the trignometric identities, We will solve it using given information.

Q: Find the four (4) values of 0 (radians) which satisfy the equation P4(cos 0) = 0

A: We need to find four values of θ which satisfy the equation P4(cosθ)=0

Q: Find the exact value of cos 495 degree.

A: Evaluate cos495°