$\"\"$

(a)

One of the angle of right triangle is $\"\"$ .

Assume that length of opposite side is $\"\"$ .

Consider length of hypotenuse as $\"\"$ .

Trigonometric function : $\"\"$ .

$\"\"$

Case 2 :

Assume that length of adjacent side as $\"\"$ .

Trigonometric function : $\"\"$ .

$\"\"$

The length of the hypotenuse is $\"\"$ or $\"\"$ .

$\"\"$

If we assume that length of the leg as length of the opposite side, then the length of the hypotenuse is $\"\"$ .

If we assume that length of the leg as length of the adjacent side, then the length of the hypotenuse is $\"\"$ .