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Mathematics 15 Online
OpenStudy (anonymous):

Find a numerical value of one trigonometric function of x for cos^2x + 2sinx-2=0

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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