Trigonometry

A skill of Mathematics (Specialization) in Professional License Test (Specialization) — Mathematics Level 2 (Middle and Secondary). Practise it with explained questions, and review your mistakes until you master it.

Skill lessons

  • المتطابقات المثلثية وحل المعادلات
    استعمال متطابقات الزاوية المضاعفة والمتطابقات الأساسية لإثبات علاقات وحل معادلات.
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Solved examples

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Example 1
في مثلث $أ = 30°$ و $ب = 45°$ وطول الضلع المقابل للزاوية أ يساوي 10 سم. ما طول الضلع المقابل للزاوية ب؟
  1. A20 سم
  2. B$10\sqrt{2}$ سم
  3. C$5\sqrt{2}$ سم
  4. D$10\sqrt{3}$ سم
Show the solution

Correct answer: B

قانون الجيب: $ب = 10 \times {جا}45°/{جا}30° = 10 \times (\sqrt{2}/2)/(\frac{1}{2}) = 10\sqrt{2}$.

Other skills in Mathematics (Specialization)

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