Krishna
0

Step 1:  Explore the given question

NOTE:   3 \tan A = 4

\tan A = \frac{4}{3}

Therefore, opposite side = 4

Step 2: Find the unknown side of the right triangle.

hyp^2 = 4^2 + 3^2

hyp = \sqrt{16 + 9}

hypotenuse = 5

Step 3:  Recall the formulas and find the \sin A , \cos A

FRMULAS: (i) \sin A =\frac{opp}{hyp}

\sin A =\frac{4}{5}