IOQM · Mathematics

Trigonometry

Trigonometric ratios, identities and applications to geometry and equations.

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About this topic in IOQM

  • Previous papers: 10 official question papers from HBCSE-TIFR (Mathematical Olympiad Cell) — 2025, 2024, 2022-23, 2021-22 and 1 earlier year.
  • Practice: 10 answer-checked practice questions on Trigonometry for IOQM — practise them.

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  • Q1 · Trigonometry · MEDIUM

    If sin θ + cos θ = √2, what is the value of sin³ θ + cos³ θ?

  • Q2 · Trigonometry · EASY

    If sin θ + cos θ = √2, find the value of sin θ cos θ.

  • Q3 · Trigonometry · HARD

    If tan A + tan B + tan C = tan A tan B tan C and A, B, C are acute angles, find the value of A + B + C in degrees.

  • Q4 · Trigonometry · MEDIUM

    If sin θ + cos θ = 7/5, where 0 < θ < π/2, find the value of 100 × sin θ × cos θ.

  • Q5 · Trigonometry · EASY

    In triangle PQR, if angle P = 45°, angle Q = 60°, and PQ = 10, find the integer closest to the length of QR.

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