Question

If cos A = 4/5, then tan A =​

Answer 1

Answer:

the answer is 3/4

Step-by-step explanation:

cos A= 4/5 = Base/hypotenuse

therefore, by Pythagoras theorem perpendicular=3

tan A= Perpendicular/base = 3/4

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Answer 2

tanA 3/4

Step-by-step explanation:

cosA=4/5

but

$\sin^{2} a + \cos^{2} a = 1$

sin^2 A+(4/5)^2=1

sin^2 A+16/25=1

sin^2 A=1-16/25

sin^2 A =9/25

sin A =3/5

but

tan A = sinA/cosA

tan A=3/5/4/5

tanA=3/4