Question

If cos A = 4/5 , then the value of tan A is:

(1 Point)

3/4

4/3

3/5

5/3​

Answer 1

Answer:

cosA=4/5

then,

let base =4x, hypotenuse=5x

using Pyth$$€agoras theorem,

5x^2=perpendicular^2+4x^2

25x^2=p^2+16x^2

25x^2-16x^2=p^2

9x^2=p^2

p=3x

tanA=p/B

=3x/4x

= 3/4..

this is ur correct ans.

I hope it will help u...

pls mark as brainliest

Step-by-step explanation:

Answer 2

Answer:

3/4

Step-by-step explanation:

if COSA =4/5

Squaring both sides, we get

COS2A =16/25

SINCE WE KNOW THAT

SIN2A + cos2A =1

sin2A +16/25 =1

sin2A = 1- 16/25= 9/25

or

sin A =3/5

since , tanA =sinA/cosA

tanA = 3/5 divided by 4/5

=3/4 hope u understand