Exams › SSC CGL (Prelims) › General

If sec A = y, express tan^2 A in terms of y.

1. 1 - y^2
2. y^2 - 1
3. 1 + y^2
4. 2y^2 - 1

Correct answer: y^2 - 1

Solution

The identity sec^2 A = 1 + tan^2 A rearranges to tan^2 A = sec^2 A - 1. With sec A = y, this becomes y^2 - 1.

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