trig

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Find the indicated trigonometric function, given that è is an angle in standard position with the terminal side passing
through the given point.
2) (15, 20); Find csc è.
A) 5/3
B) 3/4
C) 5/4
D) 4/3

  • trig -

    tanA = 20/15 = 4/3 = Y/X.
    r^2 = X^2 + Y^2,
    r^2 = 3^2 + 4^2 = 25,
    r = 5.

    sinA = Y/r = 4/5,
    cscA = 1/sinA = 5/4.

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