Trigonometry
See the triangle, move around the circle and read the graph. Choose a Class 10, 11 or 12 lesson with Rajesh Sir, or start with the complete route.
Classes 10–12 · Mathematics
Trigonometry with Rajesh Sir
Learn trigonometry with interactive triangles, exact ratios, moving graphs and worked examples. Follow clear CBSE Class 10, 11 and 12 routes with topic quizzes.
Class 10 · Mathematics
Right-triangle ratios
Build right triangles, explore five exact Pythagorean triples and understand all six trigonometric ratios with short lessons and explained checks.
Class 10 · Mathematics
Standard angles and identities
Derive exact values at 30°, 45° and 60°, understand undefined ratios and prove simple identities with clear diagrams, worked examples and short checks.
Class 10 · Mathematics
Heights and distances
Read elevation and depression diagrams, include eye height and solve one- or two-triangle problems with exact values, interactive models and checks.
Class 11 · Mathematics
Radians and the unit circle
Move around the unit circle, understand radians and discover signs, coordinates, arc lengths and chord lengths through clear examples and short quizzes.
Class 11 · Mathematics
Trigonometric graphs
Explore all six trigonometric graphs. Read zeros, signs, periods, domains and ranges, with moving points, clear asymptotes and questions after each topic.
Class 11 · Mathematics
Compound and multiple angles
Build sine, cosine, tangent and cotangent angle formulas. Derive double and triple angles, transform sums and products, and practise exact values.
Class 12 · Mathematics
Inverse trigonometry
Understand all six inverse trigonometric functions, principal branches and graphs. Explore angles, test domain choices and solve explained Class 12 checks.
Class 12 · Mathematics
Limits and derivatives
See why radians matter, derive trigonometric derivatives and use the chain rule, inverse functions and tangent slopes with complete examples and checks.
Class 12 · Mathematics
Trigonometric integrals
Learn trigonometric integration through substitution, identities, inverse forms and integration by parts. Explore signed area and check every answer.