2cos squar theta - 5cos theta +2 = 0 find general solution
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2cos² theta-5cos theta +2=0
=2cos² theta -4cos theta- 1cos theta+2=0
=2cos theta(cos theta-2) -1(cos theta-2)
=(cos theta-2) (2cos theta- 1)
=cos theta=2.
OR
=cos theta=1/2
=2cos² theta -4cos theta- 1cos theta+2=0
=2cos theta(cos theta-2) -1(cos theta-2)
=(cos theta-2) (2cos theta- 1)
=cos theta=2.
OR
=cos theta=1/2
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