answer to the 16th question
Attachments:
Answers
Answered by
1
using , quadrant concept :-
sin(3π/2-x) = -cosx
sin(3π/2 + x) = -cosx
sin(π/2 + x) = cosx
sin(5π-x) = sinx
⇒ 3(cos²x + cos²x) - 2(cos²x+sin²x)
⇒ 3(2cos²x ) - 2
sin(3π/2-x) = -cosx
sin(3π/2 + x) = -cosx
sin(π/2 + x) = cosx
sin(5π-x) = sinx
⇒ 3(cos²x + cos²x) - 2(cos²x+sin²x)
⇒ 3(2cos²x ) - 2
Similar questions