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Grade: 10 
        sir i do have one problem .please solve ut sir .if tanA =1/2 then find out the value of Sin3A.
one year ago

Answers : (1)

Arun
17753 Points 
							
Dear Akshay
 
tan A = ½
Hence 
Sin A = 1/ sqrt(5)
 
Now 
Sin 3A = 3 sinA - 4 sin³A
Now put the value of sin A and get your answer.
 
Regards
Arun (askIITians forum expert)
one year ago
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