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If 2sin2β – cos2β = 2, then β is(a) 0ᵒ(b) 90ᵒ(c) 45ᵒ(d) 30ᵒ |
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Answer» Correct answer is: (b) 90ᵒ 2sin2β – cos2β = 2 Then 2 sin2β – (1- sin2β) = 2 3 sin2β =3 or sin2β =1 β is 90ᵒ |
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