### Hello Everyone

#### I have found below online courses from Khan Academy very helpful to clear any concepts. Please refer to below links for any topic or go to Khan academy website.

#### Samarth

### Trigonometry with right triangles

Learn the basics of trigonometry: What are sine, cosine, and tangent? How can we use them to solve for unknown sides and angles in right triangles?

- Introduction to the trigonometric ratios
- Solving for a side in a right triangle using the trigonometric ratios
- Solving for an angle in a right triangle using the trigonometric ratios
- Modeling with right triangles
- Trigonometric ratios and similarity
- Sine and cosine of complementary angles
- Trigonometric ratios of special triangles
- Introduction to the Pythagorean trigonometric identity
- The reciprocal trigonometric ratios

### Trigonometry with general triangles

Learn how to use trigonometry in order to find missing sides and angles in any triangle.

### The unit circle definition of sine, cosine, and tangent

Learn how the trigonometric ratios are extended to all real numbers using algebra. Start solving simple problems that involve this new definition of the trigonometric functions.

### Graphs of trigonometric functions

Learn how to graph trigonometric functions and how to interpret those graphs. Learn how to construct trigonometric functions from their graphs or other features.

### Trigonometric equations and identities

Learn how to solve trigonometric equations and how to use trigonometric identities to solve various problems.

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