precalculus

posted by Kevin

sin^2 x + cos^2 x = 1

using that, derive what the cot^2 x would equal to.

would it be
csc^2 x - 1 = cot^2 x

  1. Reiny

    given: sin^2 x + cos^2 x = 1
    divide each term by sin^2 x

    1 + cos^2 x / sin^2 x = 1/sin^2 x
    1 + cot^2 x = csc^2 x

    which reduces to your answer.

    Good job

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