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Use a Graphing Utility to Solve the Equation on the Interval

question 393

Multiple Choice

Use a graphing utility to solve the equation on the interval 0 0x<3600 ^ { \circ } \leq x < 360 ^ { \circ } . Express the solution(s) rounded to one decimal
place.
- 3cos2x+2cosx=13 \cos ^ { 2 } x + 2 \cos x = 1


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