Question

Jor arc?
(iii) If sin d = cos B, then what is the value of a + B?​

Answer 1

Step-by-step explanation:

Sin a = cos b

Sin a = Sin(90° -b) [ using trigonometric conversion]

Now as both sides are in sin, We can equate them. Remember Sin did not get cut .

a = 90° - b

a + b = 90 °

Answer 2

B = arccos(sin(d))

d=arcsin(cos(B))