Trig question (1 Viewer)

rand_althor · Oct 6, 2015

Hey can someone do this question for me:
$$Find the general solution(s) of $\sin{x}+\cos{x}=\cos{2x}$.$

Drsoccerball · Oct 6, 2015

rand_althor said:
Hey can someone do this question for me:
$$Find the general solution(s) of $\sin{x}+\cos{x}=\cos{2x}$.$

$0= (cosx +sinx)(cosx -sinx -1 )$

$0= cosx + sinx $ or $ 1=cosx -sinx$

$For the first expression divide by cosx and the second use auxiliary angles to find a single expression rest is ez$

turnerloos · Oct 6, 2015

Drsoccerball said:
rest is ez

fuarrrr... state rank nws.

rand_althor · Oct 6, 2015

Drsoccerball said:
$0= (cosx +sinx)(cosx -sinx -1 )$

$0= cosx + sinx $ or $ 1=cosx -sinx$

$For the first expression divide by cosx and the second use auxiliary angles to find a single expression rest is ez$

Thanks!

Trig question (1 Viewer)

rand_althor

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Drsoccerball

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turnerloos

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rand_althor

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