If α + β = 90° and α : β = 2 : 1, then the ratio of cosα to cos� – McqOptions

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1.	If α + β = 90° and α : β = 2 : 1, then the ratio of cosα to cosβ is?
A.	: $$\sqrt 3 $$
B.	: 3
C.	: $$\sqrt 2 $$
D.	: 2
Answer» B. : 3

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