CBSE Class 11-science Answered
Trigonometric Functions & Identities
Asked by | 18 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 | 10 Aug, 2008, 04:40: PM
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