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Question

If x = 2sin2θ, y =2cos2θ+1 then the value of (x + y) is

A
3
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B
2
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C
1
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D
12
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Solution

The correct option is A 3
We have, x=2sin2θ,y=2cos2θ+1
So, x+y
2sin2θ+2cos2θ+1
2(sin2θ+cos2θ)+1
2(1)+1 [sin2x+cos2x=1]
3
The value of (x+y)=3.

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