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Math Help - Simplifying- verify if this correct

  1. #1
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    Simplifying- verify if this correct

    sin^3(x+1)tan^4x + tan^2xsin^3(x+1)

    = sin^3(x+1)tan^2x(tan^2x + 1)

    = sin^3(x+1)tan^2x(1/(cos^2x))

    = (sin^3(x+1)tan^2x)/(cos^2x)
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  2. #2
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    Quote Originally Posted by shane99 View Post
    sin^3(x+1)tan^4x + tan^2xsin^3(x+1)

    = sin^3(x+1)tan^2x(tan^2x + 1)

    = sin^3(x+1)tan^2x(1/(cos^2x))

    = (sin^3(x+1)tan^2x)/(cos^2x)
    I see no problem with that. Remember that \frac{1}{cos^2 \theta} = sec^2 \theta
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