railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

If x = r sin A cos B, y = r sin A sin B and z = r cos A, then find x2 + y2 + z2.

1
2x2
2
3/22
3
r2
4
223(cos2B + cos2 A)
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