The trigonometric function
.

Opposite side = 3 and adjacent side = 4
\The right triangle diagram is
\
Now find the hypotenuse by using Pythagorean theorem.
\Pythagorean theorem :
.



Take square root each side.
\
Hypotenuse = 5.
\
,
,
,
, and
.
The values of the trigonometric functions are
,
,
,
, and
.