Precalculus

posted by Angela

The directions are write the expression as the sine, coine, or tangent of an angle.
(tan 25 degrees + tan 10 degrees) / [1 - [(tan 25 degrees)(tan 10 degrees)]]

  1. MathMate

    Hint: use the following trigonometric identity
    tan(a+b)=(tan(a)+tan(b))/(1-tan(a)tan(b))

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