If α + β = 90° and α = 2β, then the value of cos2α + sin2β is: – McqOptions

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1.	If α + β = 90° and α = 2β, then the value of cos2α + sin2β is:
A.	\(\frac{1}{5}\)
B.	\(\frac{1}{3}\)
C.	\(\frac{1}{2}\)
D.	1
Answer» D. 1

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