$\"\"$

Observe the figure:

The values are sides of the triangle $\"\"$ and $\"\"$ .

Consider, $\"\"$ and $\"\"$ .

Use the side lengths to find the angle $\"\"$ :

Formula for angles of sin,cos and tan:

$\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

Therefore, the value of three trignometric ratios for angles are $\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$

$\"\"$ , $\"\"$ and $\"\"$ .