## Geometry Tutorial

*Trig Table.*

#### Intro

Trigonometry allows us to use ratios that are associated with any angle ABC, so we can calculate a broad range of heights without having to measure them. You will learn about three important ratios for any angle: sine (shortened to sin), cosine (cos) and tangent (tan).

#### Sample Problem

The base of the right-angled triangle shown is 5 cm in length, and the angle A is 60°.

Calculate the alatitude BC.

#### Solution

Tanx°= Opposite

Adjacent

Tan60°= h ÷ 5

1.7321= h ÷ 5

h = 5 × 1.73321

h = 8.6605

h ≈ 8.7 cm

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