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6-82.
  1. Review the trigonometric Pythagorean identities from Chapter 1 Math Note listed below. Homework Help ✎

    sin2x + cos2x = 1
    tan2x + 1 = sec2x
    1 + cot2x = csc2x

    1. Use one of the equations to find a new expression for sin x.

    2. Similarly, write a new expression for tan x.

    3. Similarly, write a new expression for cot2 x.

sin2x = 1 − cos2x

Refer to part (a).

Refer to part (a).