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Grade 11Trigonometry

How do i sove this trigonometric equation to get the general solutions?

Question image for How do i sove this trigonometric equation to get t
Profile image of Swapnil
9 Years agoGrade 11
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1 Answer

Profile image of Anurag Singh
9 Years ago
cos(CUBE)x+cos(square)x+4cos(square)(x/2)
=cos(square)x(1+cosx)-4cos(square)(x/2).
=2cos(square)(x/2)[cos(square)x-2]=0.
=cos(square)(x/2)=0.
>>>  x=(2n+1)Pi
 

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