1.

If x = 2sin2θ and y = 2cos2θ+1 then x+y is(a) 3(b) 2(c) 1(d) 1/2

Answer»

Correct answer is: (a) 3

x + y = 2sin2\(\theta\)+2cos2\(\theta\)+1

=2(sin2\(\theta\)+ cos2\(\theta\))+1

=2+1=3



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