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OpenStudy (anonymous):
Find a numerical value of one trigonometric function of x for cos^2x + 2sinx-2=0
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OpenStudy (dmezzullo):
hint: try using \(\cos^2(x) = 1 - \sin^2(x)\). you will have a quadratic equation and will require substitution
jhonyy9 (jhonyy9):
good idea ...
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