Find the exact value of the expression given below. cos(- 105°) Rewrite the expression using a sum or difference formula. Choose the correct answer below. A. cos(- 105°) = cos ((- 60°) + (- 45°)) = cos (- 60°)( cos - 45°) + sin (- 60°)( sin - 45°) B. cos(- 105°) = cos ((- 60°) + (- 45°)) = sin (- 60°)( cos - 45°) + cos (- 60°)( sin - 45°) c. cos(- 105°) = cos ((- 60°) + (– 45°)) = cos (- 6o°)( cos - 45°) - sin (- 60°)( sin - 45°) O D. cos(- 105°)= cos ((-60°) + (-45°)) = sin (- 60°)( cos - 45°) - cos (-60°)( sin - 45°)

Q: Give the exact value of the following: 3 4 cos (-²) = [

A:

Q: Evaluate tan (315°) + sin (150°) =

A: To find:- tan315°+sin150°

Q: Find the value of x 115

A: Given: To find: The value of x

Q: Find the exact value of the expression: cos(1050)

A: we have to find the exact value of the expression cos(105°).  Cos(A+B) =cosAcosB-sinAsinB

Q: Calculate fa₁. (1 + tan² a) da

A:

Q: Use an identity to find the value of the expression sin 1.7 csc 1.7. Do not use a calculator.

A: Given to find the value of expression sin1.7csc1.7 The trigonometric identity used here will be…

Q: 54° A B E 115° C 86°

A: Given  From given figure

Q: Simplify the expression. Do not evaluate. 2 cos?(37°) – 1

A:

Q: nny Convert -545° to radian measure. Write your answer in exact form and also approximate your…

A:

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.