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- Introduction to Trigonometry

Still Confused?

Try reviewing these fundamentals first

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Try reviewing these fundamentals first

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Get Started Now- Lesson: 15:39
- Lesson: 24:34

Basic Concepts: Use sine ratio to calculate angles and sides (Sin = $\frac{o}{h}$ ), Use cosine ratio to calculate angles and sides (Cos = $\frac{a}{h}$ ), Use tangent ratio to calculate angles and sides (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.Determine the length of the longest guy wire if the tower in the middle of the bridge is 45 yards high and the angle of elevation from where the guy wire is anchored to the top of the tower is $40^\circ.$
- 2.If the length of the guy wire is 40 metres and the angle of elevation from where the guy wire is anchored is $35^\circ$, how far from the base of the pole is the guy wired anchored?

30.

Introduction to Trigonometry

30.1

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

30.2

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

30.3

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

30.4

Combination of SohCahToa questions

30.5

Solving expressions using 45-45-90 special right triangles

30.6

Solving expressions using 30-60-90 special right triangles

30.7

Word problems relating ladder in trigonometry

30.8

Word problems relating guy wire in trigonometry

30.9

Other word problems relating angles in trigonometry

We have over 1380 practice questions in NZ Year 11 Maths for you to master.

Get Started Now30.1

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

30.2

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

30.3

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

30.4

Combination of SohCahToa questions

30.5

Solving expressions using 45-45-90 special right triangles

30.6

Solving expressions using 30-60-90 special right triangles

30.7

Word problems relating ladder in trigonometry

30.8

Word problems relating guy wire in trigonometry

30.9

Other word problems relating angles in trigonometry