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Fred graphed the following equations on his graphing calculator. y = - cos: X y=3cos²x-1 SII -to -3.T = # # 37 it Sg 321 17 2'r 2z 11-7 3:r 13j -5-TT -IT -3-T 4 4 It 4 2 3.T 4 IT 5-70 4 3-T 2 7.T 4 2- In T4 5.rc 2/2 11-7 4 3 4 13-T -II 2 6. Describe, in complete sentences, how to use the above graphs to solve 3cos² x + cosx-1=0. - The above graphes brus ear the vernca and Aurontal wiganges that occur. including Circle the feature(s) of the graph representing the solution(s) of: (3cos² x-1) (cosx) =0, -TSXX

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6. Since we have the system of two equations, the solution lies in intersection points between their graphs. We can...

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