Trigonometric Functions & Identities

Asked by  | 18th Jun, 2008, 12:55: PM

Expert Answer:

put cos2x=1-sin2x in second equation

we will get sin2x (1+sin2x)

now put cos2x = 1 - 2 sin2x in equation one we will get sin2x =cosx

so we have to find the value of cosx*(1+cosx)

now put cos2x =  2 cos2x -1

u will get cosx*(1+cosx) = 1

Answered by  | 10th Aug, 2008, 04:40: PM

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