NDA Math Trigonometric Ratios of Angles and Equations

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Question : 91 of 100

Marks: +1, -0

What is

1+sinA

1−sinA

−

1−sinA

1+sinA

equal to ?

[NDA I 2014]

sec A – tan A
2 sec A . tan A
4 sec A . tan A
4 cosec A . cot A

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