Question

2. If sin 50 = cos 40, where 50 and 40 are acute angles, then the value of is
(a) 90°
(b) 10°
(c) 45°
(d) 80°
​

Answer 1

(a) (i) If sec B-sin (36^@ + 0) = 1, find the value of 0 so that and 36^@ + 6 are acute an... [If 50 and 40 are acute angles satisfying sin 50 = cos 40 then ...