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CBSE Class 10 Answered

sin A + cos B A 30° B is an acute angle find the value of B
Asked by rusuishika | 24 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°
 
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