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Introduction to Trigonometry — GSEB Std 10 (SSC)

Master Introduction to Trigonometry for GSEB Std 10 (SSC). Free verified step-by-step solutions, 3 past exam problems, formulas, and markschemes.

Exam Questions & Step-by-Step Markschemes (3 Problems)

Question 1 • 2023 3 Marks
Evaluate without using trigonometric tables: \frac{\cos 70^\circ}{\sin 20^\circ} + \frac{\cos 55^\circ \csc 35^\circ}{\tan 10^\circ \tan 20^\circ \tan 60^\circ \tan 70^\circ \tan 80^\circ}
Answer: \frac{\sqrt{3} + 1}{\sqrt{3}} = 1 + \frac{\sqrt{3}}{3}
Question 2 • 2023 3 Marks
સાબિત કરો કે: \frac{\cos A}{1 + \sin A} + \frac{1 + \sin A}{\cos A} = 2\sec A
Answer: \text{LHS} = \text{RHS} = 2\sec A
Question 3 • 2023 3 Marks
Prove that: \frac{\cos A}{1 + \sin A} + \frac{1 + \sin A}{\cos A} = 2\sec A
Answer: 2\sec A

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