How to solve: cos(180°-2x)=√2 (sin(270°-x)+sinx)?
The answer must be:
π/4+πn
Could you help me with this one? Please.
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The answer must be:
π/4+πn
Could you help me with this one? Please.
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Verified answer
cos(180-2x) >>> -cos2x
sin(270-x)>>>> sin(180+90-x) >>>> -sin(90-x) >>>> -cosx
>>> -cos2x=sinx-cosx
cos2x=cosx-sinx
Cos180