Electrical Systems

Sine, Cosine and Phase

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Experiment and compare the sine and cos waves with phase offset (initial phase angle)

Draw the curve Sin(ωt) Draw the curve Cos (ωt  -  π 2 )

See that the curves are the same. Hence the below trigonometric identity is verified

Cos (ωt  -  π 2 )   =   Sin(ωt)

Verify few other trigonometric identities