Question

given tan A = 16/63 and that angle A is in Quadrant I, find the exact value of csc A in simplest radical form using a rational denominator

Answer 1

Answer:

csc A = 65/16

Explanation:

The tangent of an angle in a right triangle can be calculated as the opposite side over the adjacent side. It means that we can represent tan A = 16/63 as:

Then, to know the value of csc A, we need to find the hypotenuse of the triangle. So, using the Pythagorean theorem, we get that x is equal to:

$\begin{gathered} x=\sqrt[]{63^2+16^2} \\ x=\sqrt[]{3969+256} \\ x=\sqrt[]{4225} \\ x=65 \end{gathered}$

Now, the cosecant of an angle is equal to:

$\csc A=\frac{Hypotenuse}{Opposite\text{ side}}$

So, replacing the hypotenuse by the value of x and the opposite side by 16, we get:

$\begin{gathered} \text{csc A =}\frac{x}{16} \\ \csc A=\frac{65}{16} \end{gathered}$

Therefore, the answer is

cscA = 65/16