PLZZ HELP

Asked by sejal2208 | 9th Feb, 2010, 09:23: PM

Expert Answer:

sinA + sin2A = 1

So sinA = 1-sin 2A  = cos2A  .....(i)

Consider cos2A + cos4A  = cos2A +( cos2A )2 (using 1)=  sin A+ sin 2A  = 1  (given)  

Answered by  | 10th Feb, 2010, 10:58: AM

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