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

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 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?

21.

Trigonometry

21.1

Solving first degree trigonometric equations

21.2

Determining non-permissible values for trig expressions

21.3

Solving second degree trigonometric equations

21.4

Solving expressions using 45-45-90 special right triangles

21.5

Solving expressions using 30-60-90 special right triangles

21.6

Find the exact value of trigonometric ratios

21.7

ASTC rule in trigonometry (All Students Take Calculus)

21.8

Solving trigonometric equations involving multiple angles

21.9

Solving trigonometric equations using pythagorean identities

21.10

Solving trigonometric equations using sum and difference identities

21.11

Solving trigonometric equations using double-angle identities

21.12

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

21.13

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

21.14

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

21.15

Combination of SohCahToa questions

21.16

Pythagorean theorem

21.17

Unit circle

21.18

Sine law

21.19

Cosine law

21.20

Word problems relating ladder in trigonometry

21.21

Word problems relating guy wire in trigonometry

21.22

Other word problems relating angles in trigonometry

We have over 1060 practice questions in Algebra 2 for you to master.

Get Started Now21.1

Solving first degree trigonometric equations

21.2

Determining non-permissible values for trig expressions

21.3

Solving second degree trigonometric equations

21.4

Solving expressions using 45-45-90 special right triangles

21.5

Solving expressions using 30-60-90 special right triangles

21.6

Find the exact value of trigonometric ratios

21.7

ASTC rule in trigonometry (All Students Take Calculus)

21.8

Solving trigonometric equations involving multiple angles

21.9

Solving trigonometric equations using pythagorean identities

21.10

Solving trigonometric equations using sum and difference identities

21.11

Solving trigonometric equations using double-angle identities

21.12

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

21.13

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

21.14

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

21.15

Combination of SohCahToa questions

21.16

Pythagorean theorem

21.20

Word problems relating ladder in trigonometry

21.21

Word problems relating guy wire in trigonometry

21.22

Other word problems relating angles in trigonometry