1.

If the angles A, B and C of ABC be in AP and B:C = 4:3, findangle A​

Answer»

Answer:

c

Step-by-step explanation:

ANSWER

Let the ANGLES be a,a+d,a+2d.

Then, a+a+d+a+2d=180

=a+d=60. So angle B=60  

o

 Now,  

cb  =  sinC  sinB

​ =  23

⟹sinC=  23​  ×  23  

=  21  

⟹C=45  

o

 

So, ∠A=75  

o

 ......AsA+B+C=180  

Hence, option C is CORRECT.


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