 # For sin 2.c + cos x = 0, use a double-angle or half-angle formula t...

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For sin 2.c + cos x = 0, use a double-angle or half-angle formula to simplify the equation and then find all solutions of the equation in the interval [0, 2nT). The answer is x1 = , x2 = , x3 = and x4 = with x1 < x2 < x3 < x4. Find all solutions of the equation 2 cos x - 1 = 0 on 0 x < 2\T The answers are A and B, where A < B A = B = Solve - -4sin²(x)-3cos(x) - = - 3 The smallest non-negative solution is: The next smallest non-negative solution is: Find all solutions of the equation 2 cos 3.c = 1 in the interval (0, TT The answer is x1 = , x2 = and x3 = with x1 < x2 < x3. For sin 3.c + sin x = 0, use a sum-to-product formula to simplify the equation and then find all solutions of the equation in the interval . The answer is x1 = and x2 = with x1 < x2.

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