Consider the figures:

Side square *l e *diagonal

Side equilateral triangle* I *and height

## Sine, cosine and 30º tangent

Applying the definitions of sine, cosine and tangent to the 30º angles, we have:

## Sine, cosine and 45 ° tangent

Applying the definitions of sine, cosine and tangent to an angle of 45º, we have:

## Sine, cosine and 60 ° tangent

Applying the definitions of sine, cosine and tangent to an angle of 60º, we have:

**summing up**:

x | sen x | waistband x | tg x |

30º | |||

45º | |||

60º |