Question

formula for 1-cos2wt​

Answer 1

sorry I was unable to understand the question but 1-cos square theta =sin square theta

Answer 2

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${ \sin }^{2} \phi \: + { \cos }^{2} \phi = 1. \\ \\ \implies {\sin}^{2} \phi = 1 - { \cos }^{2} \phi.$

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