Simplify Trigonometric Expressions...3

Discussion in 'Geometry and Trigonometry' started by nycmathguy, Dec 8, 2021.

  1. nycmathguy

    nycmathguy

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    Section 5.1

    Question 21

    tan^2 x - tan^2 x• sin^2 x

    tan^2 x(1 - sin^2 x)

    tan^2 x(cos^2 x)

    I know that tan^2 x = sin^2 x/cos^2 x.

    [sin^2 x/cos^2 x](cos^2 x)

    Answer: cos^2 x

    Yes?
     
    nycmathguy, Dec 8, 2021
    #1
  2. nycmathguy

    MathLover1

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    here

    [​IMG].......cancel cos^2( x)

    =sin^2( x)
     
    MathLover1, Dec 8, 2021
    #2
    nycmathguy likes this.
  3. nycmathguy

    nycmathguy

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    I forgot to cancel cos^2 x.
     
    nycmathguy, Dec 8, 2021
    #3
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