Table of Contents

## Why are the special angles in trig special?

What is so special about them? Because it is easy to ‘exactly’ evaluate the trigonometric function without using a calculator for these angles. These angles have comparatively clean values, offering us a great deal to solve Math problems.

## What are special angles in trigonometry?

Special Angles. Special Angles – 30o, 45o, 60o. The values of the six trigonometric ratios cannot be calculated exactly for most angles. Nor can the exact value of an angle generally be found given the value of one of the ratios. There are, however, three special angles that lend themselves nicely to ratio calculation.

**Why is it important to be able to find trigonometric values for the special angles without using a calculator?**

However, it is possible to evaluate the trig functions for certain angles without using a calculator. This is because there are two special triangles whose side ratios we know!

**What are the 5 special angle relationship?**

In Geometry, there are five fundamental angle pair relationships:

- Complementary Angles.
- Supplementary Angles.
- Adjacent Angles.
- Linear Pair.
- Vertical Angles.

### What are the values of special angles?

Ways to Unlock This Lesson

angle/number | sine sin=OPPHYP | secant (reciprocal of cosine) |
---|---|---|

0∘=0 rad | 0 | 1 |

30∘=π6 rad | 12 | 2√3=2√33 |

45∘=π4 rad | 1√2=√22 | √2 |

60∘=π3 rad | √32 | 2 |

### What is the tangent formula in trig?

Trigonometry Equations on the basis of Tangent Function (Tangent Formulas) Various tangent formulas can be formulated through a tangent function in trigonometry. The basic formula of the tangent which is mostly used is to solve questions is, Tan θ = Perpendicular/ Base or Tanθ = Sinθ/ Cosθ Or Tanθ = 1/Cotθ.

**What’s the importance of the trig angle formulas?**

Trigonometric angle formulae are important as they help simplify expressions which are difficult to solve into easier ones. This is notably helpful when working with limits and integrals. A few concrete examples include:

**What are the six trigonometric functions of a right triangle?**

In this section, we introduce the trigonometric functions using a right triangle. There are 6 main trigonometric functions: sine, cosine, tangent, cotangent, secant, and cosecant. For acute angles, these functions can be defined as ratios between the sides of a right triangle.

## What are the functions of trigonometry?

Trigonometry functions. The main trigonometric functions are sine, cosine, and tangent, often written as sin(x), cos(x), and tan(x). The common thing for them is that they express the ratios between different sides of a right-angled triangle, from the point of view of the angle of interest, and thus some of them are transformations of the others.