Question

find the value of cos A if tan A =3/4​

Answer 1

Answer:

cos A = 4/5

Step-by-step explanation:

Here, tan A = 3/4

We know, tan A = perpendicular/ base

Now, perpendicular = 3x, base = 4x, and hypotenuse = ?

According to Pythagoras theorem,

3^2 + 4^2 = h^2

or, 9 + 16 = h^2

or, h^2 = 25

or, h = 5

Therefore,

cos A = 4/5

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