Using a Right Triangle

Discussion in 'Geometry and Trigonometry' started by nycmathguy, Nov 4, 2021.

  1. nycmathguy

    nycmathguy

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    Section 4.3
    20211103_194902.jpg

    Part (a)

    Side y is opposite angle theta.

    Part (b)

    Side x is opposite 90° - theta.

    Part (c)

    sin (theta) = cos(90° - theta) because they are co-functions.

    Yes?

    Here we end with Section 4.3.
     
    nycmathguy, Nov 4, 2021
    #1
  2. nycmathguy

    MathLover1

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    yes

    part c: In other words, the sine of an angle equals the cosine of its complement.
     
    MathLover1, Nov 4, 2021
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    nycmathguy likes this.
  3. nycmathguy

    nycmathguy

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    Perfect.
     
    nycmathguy, Nov 4, 2021
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