Still Confused?

Try reviewing these fundamentals first.

- Home
- Trigonometry
- Right Triangle Trigonometry

Still Confused?

Try reviewing these fundamentals first.

Still Confused?

Try reviewing these fundamentals first.

Nope, I got it.

That's that last lesson.

Start now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started Now- Lesson: 12:07
- Lesson: 22:51
- Lesson: 33:54

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.A bird is sitting in a 35 metre tall tree looking down at a worm on the ground. If the angle of depression from the bird to the ground is $55^\circ$, how far is the bird from the worm?
- 2.Standing on the balcony of an building A, the angle of elevation to the top of the building B across the street is $47^\circ$, and the angle of depression to the bottom of the building B is $58^\circ.$ If the buildings are 42 metres apart, find the height of the building B across the street.
- 3.Polar Company has designed an ice block in the shape of a cube. The volume of the cube is 15,625 $cm^3.$ Which of the following dimensions is the smallest opening of an ice dispenser that will accommodate length AB?

45cm wide

1.

Right Triangle Trigonometry

1.1

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

1.2

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

1.3

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

1.4

Combination of SohCahToa questions

1.5

Solving expressions using 45-45-90 special right triangles

1.6

Solving expressions using 30-60-90 special right triangles

1.7

Word problems relating ladder in trigonometry

1.8

Word problems relating guy wire in trigonometry

1.9

Other word problems relating angles in trigonometry

We have over 310 practice questions in Trigonometry for you to master.

Get Started Now1.1

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

1.2

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

1.3

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

1.4

Combination of SohCahToa questions

1.5

Solving expressions using 45-45-90 special right triangles

1.6

Solving expressions using 30-60-90 special right triangles

1.7

Word problems relating ladder in trigonometry

1.8

Word problems relating guy wire in trigonometry

1.9

Other word problems relating angles in trigonometry