Solve for x:4cos6x-sin6x=cos^3x+3cos2x
Gaurav , 10 Years ago
Grade
Trigonometry> Solve for x: 4cos6x-sin6x=cos^3x+3cos2x
1 Answers
Sher Mohammad
Last Activity: 10 Years ago
4cos6x-sin6x=cos^3x+3cos2x
for x=0,.
4-0=1+3
means x=0 is a solution
for x=pi
4- 0= -1 +3 , not a solution.
hence only 2npi , is solution of the equation where n=1,2,3..............
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