Sinx and Cosx

Sinx + sin2x=sin3x = 1
cos6x - 4cos4x - 8cos2 =

Explain also please

2 Answers

11
Mani Pal Singh ·

=sin3x = 1
cos6x - 4cos4x - 8cos2x =

sin3x=1 in case only when x=n pi/2
and so it cannot be equal to Sinx + sin2x
recheck ur ques!

39
Dr.House ·

the correct question should be

Sinx + sin2x+sin3x = 1

cos6x - 4cos4x - 8cos2x = ?

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