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Class 10 Mathematics — Chapter 8: Introduction to Trigonometry
67 practice questions · 23 Easy · 23 Medium · 21 Hard
Free NCERT-aligned multiple-choice practice for Class 10 Mathematics, Chapter 8 (Introduction to Trigonometry). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 67.
Sample questions
Q1Easy
In a right triangle, sin θ is defined as:
A.Adjacent / Hypotenuse
B.Opposite / Hypotenuse✓ correct
C.Opposite / Adjacent
D.Hypotenuse / Opposite
Why
sin θ = opposite side / hypotenuse.
Q2Medium
If sin θ = 3/5, then cos θ equals:
A.3/4
B.4/5✓ correct
C.5/3
D.5/4
Why
sin² θ + cos² θ = 1 ⇒ cos² θ = 1 − 9/25 = 16/25 ⇒ cos θ = 4/5.
Q3Hard
sec² θ − tan² θ equals:
A.0
B.1✓ correct
C.−1
D.sin² θ
Why
Standard identity: sec² θ − tan² θ = 1 (derived from sin² θ + cos² θ = 1).
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