Question

please help please solve this question​

Answer 1

Answer:

AB = 24 cm

Step-by-step explanation:

In Δ ADE

cos A = $\frac{8}{10}$ = $\frac{4}{5}$

sin A = $\sqrt{1-cos^2A}$ = $\sqrt{1-(16/25)}$ = √(9/25) = 3/5

tan A = sin A / cos A = 3/5 ÷ 4/5 = 3/4 ..... (1)

tan A = $\frac{BC}{AB}$  ..... (2)

(1) and (2)

$\frac{18}{AB}$ = $\frac{3}{4}$

AB = $\frac{4*18}{3}$ = 24 cm