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Get Started Now- Lesson: 11:37
- Lesson: 21:32

Basic concepts: Use sine ratio to calculate angles and side (Sin = $\frac{o}{h}$ ), Use cosine ratio to calculate angles and side (Cos = $\frac{a}{h}$ ), Use tangent ratio to calculate angles and side (Tan = $\frac{o}{a}$ ), Combination of SohCahToa questions,

Related concepts: Ferris wheel trig problems, Tides and water depth trig problems, Spring (simple harmonic motion) trig problems,

- 1.A ladder is leaning against an outside wall of a building. If the angle of elevation at the base of the ladder to the wall is $65^\circ$ and the ladder is 14 feet long, how far up the wall does the ladder reach?
- 2.A 23 foot long piece of wood is leaning against the wall of a house. If the angle of elevation at the base of the wood to the wall is $75^\circ$, how far is the wood from the base of the wall?

30.

Trigonometry

30.1

Using sine ratio to calculate angles and side (Sin = $\frac{o}{h})$

30.2

Using cosine ratio to calculate angles and side (Cos = $\frac{a}{h}$)

30.3

Using tangent ratio to calculate angles and side (Tan = $\frac{o}{a} )$

30.4

Combination of SohCahToa questions

30.5

Word problems relating ladder in trigonometry

30.6

Word problems relating guy wire in trigonometry

30.7

Other word problems relating angles in trigonometry

We have over 1110 practice questions in Algebra 1 for you to master.

Get Started Now30.1

Using sine ratio to calculate angles and side (Sin = $\frac{o}{h})$

30.2

Using cosine ratio to calculate angles and side (Cos = $\frac{a}{h}$)

30.3

Using tangent ratio to calculate angles and side (Tan = $\frac{o}{a} )$

30.4

Combination of SohCahToa questions

30.5

Word problems relating ladder in trigonometry

30.6

Word problems relating guy wire in trigonometry

30.7

Other word problems relating angles in trigonometry