If cos α = sin β, which of the following could be true of α and β? I. α + β = 90° II. α and β lie in different quadrants III. α

Question

If cos α = sin β, which of the following could be true of α and β?
I. α + β = 90°
II. α and β lie in different quadrants
III. α = β
(A) I only
(B) II only
(C) III only
(D) I and III only
(E) I, II, and III

Kunduz · Accepted Answer

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