prove that cos^2A+sin^2A.cos2B=cos^2B+sin^2B.cos2A​

Question

prove that cos^2A+sin^2A.cos2B=cos^2B+sin^2B.cos2A​

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Nevaeh 2 mins 2021-09-15T22:35:16+00:00 1 Answer 0

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    2021-09-15T22:37:02+00:00

    Notice that both sides of the equation have a similar form. If we ignore angle functions we end up with,

    A+A\cdot B=B+B\cdot A

    That is true if condition A=B is met.

    Otherwise it is false.

    Hope this helps.

    r3t40

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