engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) Mathematics Trigonometry Multiple and Sub-multiple Angles

यदि sin x = -1/2 और π < x < 3π/2 तो cos 2x का मान ज्ञात कीजिए।

1
1/2
2
1/4
3
3/4
4
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