Question

f sin A = 1/2 and cos B = 1/2, then A + B = ? *



60

30

90

0​

Answer 1

Answer:

sinA=  

2

1

​  

 

∵sin30  

∘

=  

2

1

​  

 

∴A=30  

∘

 

cosB=  

2

​  

 

1

​  

 

∵cos45  

∘

=  

2

​  

 

1

​  

 

∴B=45  

∘

 

∴(A+B)=30  

∘

+45  

∘

=75  

∘