if x = sin2 B and Y =2 cos2 B+1 then find 2x+y
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Step-by-step explanation:
x=sin²B and y=2cos²B+1
2x+y=2(sin²B)+2cos²B+1
=2sin²B+2cos²B+1
=2(sin²B+cos²B)+1. (sin²B+cos²B=1)
=2(1)+1
=2+1
=3
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