Question #933a2

1 Answer
Nghi N.
Sep 6, 2015

Solve:
1. sin x = 0.5623
2. cos x = 0.8963
3. tan x = -2.89

Explanation:

  1. Calculator gives -->
    sin x = 0.5623 --> x = 34.22 and x = 180 - 34.22 = 145.78 deg.
    Extended answers:
    x = 34.22 + k360 deg
    x = 145.78 + k360 deg
  2. cos x = 0.8963 --> #x = +- 26.32# deg
    Extended answers: #x = +- 26.32 + k360# deg.
  3. tan x = -2.89 --> x = -70.93 and x = -70.93 + 180 = 109.09 deg
    Extended answers:
    x = 109.09 + k180 deg
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