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Get Started Now- Lesson: 113:03
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- Lesson: 33:21
- Lesson: 4a2:57
- Lesson: 4b1:32
- Lesson: 4c1:09
- Lesson: 5a1:52

One of the trigonometric ratios is sine ratio. It is the opposite side over the hypotenuse of right triangles. In other words, we can find the angles and sides of right-angled triangles by using the sine ratios.

- 1.What are sine, cosine and tangent?
- 2.Determine each sine ratio using calculatora)$\sin 60^\circ$b)$\sin-60^\circ$
- 3.Determine the angle to the nearest degreea)$\sin \theta =0.57$b)$\sin \theta = -0.65$
- 4.Determine the angles and sides using Sine ratioa)Find angle A and B:

b)Find the value of "x" using sine

c)Find the value of "x" using sine

- 5.Draw and label a right triangle to illustrate sine ratio, then calculate the angle.a)$\sin \theta = {5 \over 13}$

6.

Angles and trigonometry

6.1

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

6.2

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

6.3

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

6.4

Combination of SohCahToa questions

6.5

Solving expressions using 45-45-90 special right triangles

6.6

Solving expressions using 30-60-90 special right triangles

6.7

Word problems relating ladder in trigonometry

6.8

Word problems relating guy wire in trigonometry

6.9

Other word problems relating angles in trigonometry

We have over 420 practice questions in Geometry for you to master.

Get Started Now6.1

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

6.2

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

6.3

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

6.4

Combination of SohCahToa questions

6.5

Solving expressions using 45-45-90 special right triangles

6.6

Solving expressions using 30-60-90 special right triangles

6.7

Word problems relating ladder in trigonometry

6.8

Word problems relating guy wire in trigonometry

6.9

Other word problems relating angles in trigonometry