1.

If sinA=4/5 then tan2A will be??​

Answer»

Answer:

24/7 is CORRECT ans

Explanation:

if SinA=4/5

then COS A=3/5 (by TRIGONOMETRY identities)

now TAN 2A=Tan A + Tan A/1-Tan A.Tan A

now Tan A=Sin. A/ Cos A=4/3

so tan 2A= (4/3)×2/1-(4/3)^2

=(8/3)/ (-7/9)

= -24/7



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