Question

if tan a is equal to X by y then find the value of Cos A​

Answer 1

Answer:

y/x^2 + y^2

Step-by-step explanation:

tan = perpendicular/ base,= x/y

By Pythagoras theorem

hypotenuse=x^2 + y^2

cod = base/hypotenuse = y/x^2 + y^2

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Answer 2

cosA = $\frac{y}{\sqrt{x^2+y^2}}$

Step-by-step explanation

We have given $tanA=\frac{X}{Y}$

We know that $tanA=\frac{Perpendicular}{base}$

So perpendicular = x and base = y

From Pythagoras theorem hypotenuses $=\sqrt{x^2+y^2}$

We have to find cos A

cosA will be equal to  $cosA=\frac{base}{hypotenuses}=\frac{y}{\sqrt{x^2+y^2}}$

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