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Mathematics 13 Online
OpenStudy (anonymous):

Find all radian solutions: 4sin^2 + 4cosx - 5 = 0

OpenStudy (tkhunny):

Use this dentity, \(\sin^{2}(x) = 1-\cos^2(x)\) Simplify, and rethink...

OpenStudy (anonymous):

got it. thanks loads!

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