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Mathematics, 21.08.2021 02:20 mooreadrian412
Use a compound angle formula to develop an equivalent expression for cos3x and use that expression to solve the equation 2cos3x+cos2x+1=0 on the interval 0x2.. Express your answer(s) as exact radians and approximate radians rounded to two decimals where applicable. Show your work. **HINT** express everything in terms of cosx.
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