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Trigonometry

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Verify the identities algebraically.
1.) TAN^5 X= TAN³X SEC²X-TAN³X

2.) COS³X SIN²X= (SIN²X-SIN^4X)COS X

  • Trigonometry -

    LS = cosx (cos^2 x) (sin^2 x)
    = cosx (1 - sin^2 x) (sin^2 x)
    = cosx(sin^2 x - sin^4 x)
    = RS

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