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It helps to convert everything to cosines, using the Pythagorean formula, i.e., sin2x + cos2x = 1.
sin2x + cos x = 0
(1 - cos2x) + cos x = 0
-cos2x + cos x + 1 = 0
cos2x - cos x - 1 = 0
Now you can apply the quadratic formula, solving for cos x, and using a = 1, b = -1, c = -1.
It helps to convert everything to cosines, using the Pythagorean formula, i.e., sin2x + cos2x = 1.
sin2x + cos x = 0
(1 - cos2x) + cos x = 0
-cos2x + cos x + 1 = 0
cos2x - cos x - 1 = 0
Now you can apply the quadratic formula, solving for cos x, and using a = 1, b = -1, c = -1.
It helps to convert everything to cosines, using the Pythagorean formula, i.e., sin2x + cos2x = 1.
sin2x + cos x = 0
(1 - cos2x) + cos x = 0
-cos2x + cos x + 1 = 0
cos2x - cos x - 1 = 0
Now you can apply the quadratic formula, solving for cos x, and using a = 1, b = -1, c = -1.
It helps to convert everything to cosines, using the Pythagorean formula, i.e., sin2x + cos2x = 1.
sin2x + cos x = 0
(1 - cos2x) + cos x = 0
-cos2x + cos x + 1 = 0
cos2x - cos x - 1 = 0
Now you can apply the quadratic formula, solving for cos x, and using a = 1, b = -1, c = -1.
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