Mathematics, 20.09.2019 19:30 starwarsfan392

If m. sins^2a - n. cos^2a = m-n then prove m. sin^4a + n. cos^4a = mn/m+n

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If m. sins^2a - n. cos^2a = m-n then prove m. sin^4a + n. cos^4a = mn/m+n...