# Trigonometry Help & Practice

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##### 1Right Triangle Trigonometry

- 1.1Use sine ratio to calculate angles and sides (Sin = $\frac{o}{h}$ )
- 1.2Use cosine ratio to calculate angles and sides (Cos = $\frac{a}{h}$ )
- 1.3Use tangent ratio to calculate angles and sides (Tan = $\frac{o}{a}$ )
- 1.4Combination of SohCahToa questions
- 1.5Solving expressions using 45-45-90 special right triangles
- 1.6Solving expressions using 30-60-90 special right triangles
- 1.7Word problems relating ladder in trigonometry
- 1.8Word problems relating guy wire in trigonometry
- 1.9Other word problems relating angles in trigonometry

- 1.1Use sine ratio to calculate angles and sides (Sin = $\frac{o}{h}$ )
##### 2Trigonometric Ratios and Angle Measures

- 2.1Angle in standard position
- 2.2Coterminal angles
- 2.3Reference angle
- 2.4Find the exact value of trigonometric ratios
- 2.5ASTC rule in trigonometry (
**A**ll**S**tudents**T**ake**C**alculus) - 2.6Unit circle
- 2.7Converting between degrees and radians
- 2.8Trigonometric ratios of angles in radians
- 2.9Radian measure and arc length
- 2.10Law of sines
- 2.11Law of cosines
- 2.12Area of triangles:$\frac{1}{2} ab$ sinC
- 2.13Applications of the sine law and cosine law

- 2.1Angle in standard position
##### 3Bearings

##### 4Graphing Trigonometric Functions

##### 5Applications of Trigonometry Functions

##### 6Trigonometric Identities

##### 7Trigonometric Equations

- 7.1Solving first degree trigonometric equations
- 7.2Determining non-permissible values for trig expressions
- 7.3Solving second degree trigonometric equations
- 7.4Solving trigonometric equations involving multiple angles
- 7.5Solving trigonometric equations using pythagorean identities
- 7.6Solving trigonometric equations using sum and difference identities
- 7.7Solving trigonometric equations using double-angle identities

- 7.1Solving first degree trigonometric equations
##### 8Inverse Trigonometric Functions