1.

If tan is equal to x by y , what is the value of Cos A

Answer»

ANSWER:

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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If x cos theta is equal to 1 and tan theta is equal to y , find the value of x square minus y square


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