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FIND THE GENERAL SOLUTION OF THE EQUATION COS X COS 6X = −1


FIND THE GENERAL SOLUTION OF THE EQUATION COS X COS 6X = −1


Grade:12

1 Answers

SAGAR SINGH - IIT DELHI
878 Points
13 years ago

Dear student,

write cos6x as cos3(2x) and then use the formula for cos3theta

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