Question

mankuthemonkey01 need help


If 3 tanA = 4, then find sin A and cos A.

Answer 1

Answer:

sin A = 4/5  

  cos A = 3/5

Step-by-step explanation:

3tanA = 4  

 tanA = 4/3

  tanA = opp/adj = 4/3  

   hyp² =s²+s²

   h²  = 16 +9

   h² = 25  

   h = 5

sin A = opp / hyp

         = 4/5

cos A = adj/hyp

         = 3/5

∴sin A = 4/5  

  cos A = 3/5

Answer 2

ANSWER

3tanA = 4

tanA = 4/3

tanA = opp/adj

= 4/3 hyp²
=s²+s² h²
= 16 +9 h²
= 25 h
= 5 sin A
= opp / hyp
= 4/5 cos A
= adj/hyp = 3/5
∴sin A = 4/5
cos A = adj/hypo
Cos A =3/5

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