Question

Find the Period of f(x) = 4sin^2 x + 7cos^2 x

Answer 1

2(1-cos2x) + 7/2 + 7cos2x/2

= 11/2 + 3/2 (cos2x)

Answer 2

Period of Cosx = 2pie

so 3/2 * 2pie/2 = 3pie/2 .........Is it correct?

Answer 3

@sauravshakya @satellite73

Answer 4

@ghazi

Answer 5

i think you have to take the LCM of the periods of these two

Answer 6

But it is cos^2 x and sin^2 x

Answer 7

oh i thought it's cos 2x and sin 2x

Answer 8

i don't see any fault in your answer