ICSE Class 10
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Trigonometry

Trigonometric Identities

Official ICSE Class 10 syllabus — session 2026-2027.

5. Trigonometry — (a) Trigonometric Identities

Using Identities to solve/prove simple algebraic trigonometric expressions:

  • sin²A + cos²A = 1
  • 1 + tan²A = sec²A
  • 1 + cot²A = cosec²A; 0 ≤ A ≤ 90°

Source: CISCE ICSE Class 10 Syllabus 2026-2027