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Question

The number of values of x for which sin2x+cos4x=2 is

A
\N
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B
1
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C
2
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D
infinite
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Solution

The correct option is A \N
sin2x+cos4x=2
sin2x=1,cos4x=1
12sin22x=1 or 1 – 2 = 1(absurd)
Thus, no solution.

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