Question

pls solve it trigonometry​

Answer 1

Answer:

Step-by-step explanation:

if cos A = 4/5

Adj/hyp=4/5

Adj=4x and hyp = 5x

opp=√[hyp² - adj ²]

opp= 3x

tan A = OPP/ADJ

         = 3x/ 4x

         = 3/4

Answer 2

Step-by-step explanation:

If cos A= 4/5

we know that cos A= B/H

so, the base =4

and hypotenuse =5

we have to find perpendicular =?

H^2=B^2+P^2

P^2= B^2 - H^2

= (4)^2 - (5)^2

P^2 = 16 - 25

P^2. = 9

p = under root 9

perpendicular = 3

tan A= P/ B

tan A= 3/4. (answer. b. is correct)