Introduction to Trigonometry

CBSE Class 10 · Mathematics · 60 past questions

These are the board's own papers. 130 more board questions reprinted in the books we use in class are for signed-in students: sign in.

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1. Q9 2026

   Prove that : $\sqrt{\dfrac{1+\sin A}{1-\sin A}} = \sec A + \tan A$

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2. Q10 2026

   Prove that : $\frac{\sin\theta-\cos\theta+1}{\sin\theta+\cos\theta-1}=\frac{1}{\sec\theta-\tan\theta}$

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3. Q14 2026 (Basic)

   Prove that $\frac{\cot A - \cos A}{\cot A + \cos A} = \frac{\sec A - \tan A}{\sec A + \tan A}$

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4. Q16 Sample paper 2026-27

   If $\tan\theta = \frac{1}{\sqrt{5}}$, then find the value of…

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5. Q17 Sample paper 2026-27

   During a math class, Ms. Isha wrote the expression given below on the board and asked the students to…

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