engineering recuitment HPCL Junior Executive 2025 Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

यदि  cos x = -1/2 और π < x < 3π/2 है, तो 2 tan2x + 3 cosec2x का मान होगा:

1
4
2
16
3
8
4
10
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