Solve this: Q6 Which of the following expressions is equivalent tocos θ cosθ2-cos7θ2cos 5θ - Maths - Trigonometric Functions

Question

Solve this:

Q6 Which of the following expressions is equivalent to cos  
θ   cos θ 2 - cos 7 θ 2 cos   5 θ
?

A     cos 3 θ 2     sin   17 θ
2 B     1 2 cos 3 θ 2     sin   17
θ 2 C   1 2   sin   9   θ  
sin   4 θ D     sin 9 θ 2    
sin   4 θ

Shilpa Patel · Accepted Answer

Solve this: Q6. Which of the following expressions is equivalent to cos θ cos θ 2 - cos 7 θ 2 cos 5 θ ? A cos 3 θ 2 sin 17 θ 2 B 1 2 cos 3 θ 2 sin 17 θ 2 C 1 2 sin 9 θ sin 4 θ D sin 9 θ 2 sin 4 θ