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Mertsj
 one year ago
Best ResponseYou've already chosen the best response.1Replace sin^2x with 1cos^2x. Get it equal to 0 and factor.

jishan
 one year ago
Best ResponseYou've already chosen the best response.03+ 2cos^2x= 5cos^2x+ 3sin^2x lhs= 3+ 2cos^2x = 3( sin^2x+cos^2x) + 2cos^2x =3 sin^2x+3cos^2x + 2cos^2x =5cos^2x+ 3 sin^2x =rhs put sin^2x +cos^2x = 1
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