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 | ![]() | ![]() | ![]() |