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Number of roots of the equation `(3+cos"x")^2=4-2sin^8x ,x in [0,5pi]a r e`_________ |
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Answer» Correct Answer - 3 `4 le L.H.S. le 16` `2 le R.H.S. le 4` Hence, equality can occur only when both sides are 4, which is possible if `x=pi, 3pi, 5 pi`. That is, there are three solutions. |
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