1. Math
2. Trigonometry
3. whenandnbspcos2andminussin2fxcos2xandminussin2xandnbspis written in phase angle formandnbspsinasinkxandalpha the phase angleandnbspandalphaandnbspis recallandnbspandalphaandnbspis...

Question: whenandnbspcos2andminussin2fxcos2xandminussin2xandnbspis written in phase angle formandnbspsinasinkxandalpha the phase angleandnbspandalphaandnbspis recallandnbspandalphaandnbspis...

Question details

When 𝑓(𝑥)=cos(2𝑥)−sin(2𝑥)$f(x)=\cos (2x)-\sin (2x)$ is written in phase angle form 𝐴sin(𝑘𝑥+𝛼)$A\sin (kx+\alpha )$, the phase angle 𝛼$\alpha$ is (recall 𝛼$\alpha$ is principal):

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