Question

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

Answer 1

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,  

c b  =  sinC  sinB

​ =  2 3

⟹sinC=  23​  ×  2 3  

=  2 1  

⟹C=45  

o

 

So, ∠A=75  

o

 ......AsA+B+C=180  

Hence, option C is correct.

Answer 2

Answer:

here ur answer

Step-by-step explanation:

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