Trigonometric Functions Of Sum And Difference Of Two Angles

To solve the problem, we need to determine the value of in the given right triangle. Let us analyze the figure step by step.

Step 1: Understand the Triangle The given triangle is a right triangle with:
(right angle),
Hypotenuse ,
Side ,
Side .

We are asked to find , where is the reciprocal of : and

Step 2: Identify the Opposite and Hypotenuse for In :
The side opposite to is .
The hypotenuse is . Thus:

Step 3: Calculate Since is the reciprocal of : Final Answer: