sin A + cos B A 30° B is an acute angle find the value of B

Asked by rusuishika | 24th Dec, 2020, 08:44: PM

Expert Answer:

sin A + cos B = 1 
As A = 30°
 
Sin 30° = 1/2
 
1 half + cos B = 1
Cos B = 1-1 half
Cos B = 1 half
This will happen when B = 60°
 

Answered by  | 26th Dec, 2020, 12:30: AM