I wanted to know if sin^m x +cos^m x =0. If 'm' is an even no.?

Asked by  | 11th May, 2012, 11:38: AM

Expert Answer:

No its not true.
We know a very important identity:
sin2x + cos2x = 1
Here, m = 2, which is even.
Thus, sinmx + cosmx = 0 is not true for m = 2.
For m = 4, 6, etc we can just simplify this expression and see the result.

Answered by  | 11th May, 2012, 12:06: PM

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