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Example 2:
If and is an acute angle in a right triangle, determine the value of the other trigonometric

6
functions of ! sin =
7
Solution.

Based on this information, take a right triangle with the length of the hypotenuse 7 and

the length of the side opposite the angle is 6. To determine the length of the side beside
the angle use the Pythagorean theorem as follows :

All the lengths of the sides of the triangle are known, then the value of other

trigonometric ratios can be found

• The value of the trigonometric ratio of the angles of 30°, 45°, and 60°

From the examples described earlier, the value of the trigonometric ratio of an acute