Flag Trigonometry> sir i do have one problem .please solve u...
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sir i do have one problem .please solve ut sir .if tanA =1/2 then find out the value of Sin3A.

Akshay kumar Gupta , 7 Years ago
Grade 10
anser 1 Answers
Arun

Last Activity: 7 Years ago

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)
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