Algebra 2

Find the trigonometric ratios.

Right triangle A B C has right angle C with side A B equal to 53, B C equal to 28, and C A equal to 45.

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  1. There is no escape from memorizing the following:
    sinθ = opposite/hypotenus
    cosθ = adjacent/hypotenuse
    tanθ = opposite/adjacent

    cscθ = 1/sinθ
    secθ = 1/cosθ
    cotθ = 1/tanθ

    you have all the numbers, make a sketch of your triangle and evaluate

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  2. actually, there is an escape.
    Do about a hundred similar problems. After the first couple dozen, you will no longer have to look up the formulas; you will have learned them, not just memorized them.

    Memorization will drive you crazy with trig. There are so many formulas which are similar, yet different!
    Learn them live them, love them!

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