1.

$$\sqrt {\frac{{1 + {\text{sin }}\theta }}{{1 - {\text{sin }}\theta }}} $$+ $$\sqrt {\frac{{1 - {\text{sin }}\theta }}{{1 + {\text{sin }}\theta }}} $$is equal to?

A. cosθ
B. sinθ
C. cotθ
D. secθ
Answer» E.


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