engineering recuitment NPCIL Plant Operator Mock Test Mathematics Trigonometry Inverse Trigonometric Functions

\(\rm \sin^{-1} \left ( \frac {-1}{\sqrt 2}\right)\) का प्रमुख मान ज्ञात कीजिए।

1
135° 
2
45°
3
-45°
4
इनमें से कोई भी नहीं
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