(7) Determine the exact value of cos 4

Q: Give the exact value of CoS 2

A: We have to find the values of angle at which the value of cosine is -32.

Q: What is the exact value of Cos- 4 ?

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

Q: Determine the exact value of cos(120)° V3 2

A: The given question is from the trigonometry and can be solved as shown below.

Q: Find the exact value of the expression cos-1 0

A:

Q: Find the value of z where z = cos ¹2.

A: We are required to: Find the value of z such that z=cos-12.

Q: Find cos 2a, if cosa =12/13and 3pi/2 <a<2

A:

Q: (3) Find cot(cos-(1/3)) OS

A:

Q: Determine the exact value of cos T + TT 3 6

A:

Q: Find the exact value of cos 5p 12

A: We have to find exact value of the trigonometric expression: cos 5π12 Rewriting the given…

Q: Find the exact value of cos- 12

A:

Q: 1.) What is the cos(B)? 10 5/3 C 5 B. A,

A:

Q: tanla= 2 with 3T LaL2p 3 2 and Sin lb) = 3 with IT L6LT 2. %3D

A: Solution:-  tana=-23   with 3π2<a<2π (fourth quadrant) sinb=34 with    π2<b<π   (second…

Q: Find cos (5) exactly. 12

A: To find it we will use formula Cos(x/2) = √[{1+cos(x)}/2].

Q: Find the value of the cos I

A: Given,

Q: Find cos(A - B). cos A = V10 and sin B = ,where 0° <A<90° and 270° <B< 360°. 10 O V10-3 30 20 O…

A: Given query is to find cos (A-B).

Q: 2T Find the exact value of cos 3

A: given :

Q: Find the exact value of cos COS 3 π 2 0 3 π 2

A: The cosine function is negative in third document.

Q: 4. Determine the exact value of cos 6.

A:

Q: Evaluate cos 1 (2+3i).

A: Given :    cos-12+3i

Q: Find the value of cos-1(2) using Euler's formula.

A: We find cos-1(2) , by using Euler's formula.

Q: В 3 C 4 A Find cos(B) in the triangle.

A: Since cos(x) is in the ratio of base and hypotenuse

Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.