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    cabana23's Avatar
    cabana23 Posts: 2, Reputation: 1
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    #1

    Dec 8, 2008, 02:44 PM
    Trig Identities
    Solve each trig. Equation for x in interval 0 < x < 360

    a) 8sin^2x - 8sinx + 1 = 0

    b) sin(x + 360/4) = (squared 2) cos x
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Dec 9, 2008, 03:17 PM
    a)
    Treat this as a quadratic. Let

    Then, we get

    Solve.
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