Write the expression in terms of sine only. − (square root sign)3 sin x + cos x

i tried squaring them and it didn't work

the question is really hard...

please help its very urgent
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1 Answer

cos(x)=1-2(sin(x/2))^2.

From this we can build an expression for -sqrt(3sinx+cosx)=-sqrt(3sinx+1-2(sin(x/2))^2), which only involves sines.

by Top Rated User (1.1m points)

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