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OpenStudy (anonymous):
Solve 4cos^2A=3cosA For 90º≤A≤180
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OpenStudy (jdoe0001):
\(\bf 4cos^2(A)=3cos(A)\implies 4cos^2(A)-3cos(A)=0\) take common factor, solve for "A"
OpenStudy (anonymous):
The final answer is 90. Thank you!
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