1.

If cosθ + sinθ = $$\sqrt 2 $$ cosθ, then cosθ - sinθ is?

A. $\sqrt 2 $$ tanθ
B. $$\sqrt 2 $$ cosθ
C. $$\sqrt 2 $$ sinθ
D. $\sqrt 2 $$ sinθ
Answer» E.


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