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sweet [91]
3 years ago
14

If cos x=1/2 and 90°

Mathematics
1 answer:
Talja [164]3 years ago
5 0

When I factor[ 2cos (square) - 5cos -3], I get (2cos + 1)(cos - 3). 2cos + 1 = 0, 2cos = -1, cos = -0.5,. Using inv cos on calculator, I get 120 degree related angle.

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