engineering recuitment NPCIL Plant Operator Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
\(\sqrt {{{\sec }^2}\theta \; + \;cose{c^2}\theta } \; = \; \ldots\)
1
tanθ - cotθ
2
cotθ - tanθ
3
cotθ + tanθ
4
None of the above