RRB NTPC · Question 31
If \(\sin A = \frac{1}{{\sqrt 2 }}\) and \({\mathop{\rm Cos}\nolimits} B = \frac{{\sqrt 3 }}{2}\), then, find the value of (A + B)º. A. 60º B. 75º C. 105º D. 90º
Show answer & explanation
Answer: (D) B
Explanation
sin A = 1/√2 gives A = 45°, and cos B = √3/2 gives B = 30°. A + B = 75°.