sin  A = 12/13 হলে tan A= ?

A    5/12

B    12/5

C    12/7

D    13/12

Solution

Correct Answer: Option B

 

here, sinA = 12/13 so, cos2A =1-sin2A           = 1-(12/13)2          = 1 - (144/169)         = 169-144/169          = 25/169 cosA= 5/13 so, tan A = sinA/cosA = 12/13  X 13 X 5 =12/5 

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