Values of Trigonometric Functions for Angles of 30°, 45° and 60°

There are right triangles that we consider as standard geometrical objects.
They are used quite often and it is necessary to know ratios of their sides.

One of them is the right triangle with acute angles of 30° and 60°. The other one is the isoscales triangle with angles of 45°.
Usually the values for these angles are given in the tables.

Right triangle 90°-60°-30°

Isoscales right triangle

Table of the values of trigonometric functions

	30°	45°	60°
sin a
cos a
tg a
ctg a

To evaluate these values by yourself click here.