Question

If $CosA=\frac{3}{5}$, Find tanA?

• A. $$\frac{4}{3}$$
• B. $$\frac{2}{3}$$
• C. $$\frac{3}{4}$$
• D. $$\frac{5}{4}$$

Answer 1

Answer:

$$\frac{4}{3}$$

$Cos A= \frac{Adj}{Hyp}$

$=\frac{3}{5}$

$Hypo^2=Base^2+Adj^2$

$5^2=Base^2+3^2$

$Base^2=25-9$

$Base^2=16$

$Base=4$

$tan A=\frac{opp}{Adj}$

$=\frac{4}{3}$