Solving trigonometric equations using pythagorean identities

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Now Playing:Solve trig equations using pythagorean identities– Example 1
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  1. Utilizing "Pythagorean Identities" to solve:

    2cos2x+3sinx3=0 2\cos^2x + 3\sin x - 3 = 0
    0x0 \leq x < 2π2\pi