# CBSE Class 10-Mathematics: Chapter –8 Introduction to Trigonometry Part 12

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## 4 Mark Questions

**Question 1:**

Express the trigonometric ratios and in terms of .

**Answer:**

For

By using identity

For

By using identity

For

**Question2:**

Write the other trigonometric ratios of A in terms of .

**Answer:**

For

By using identity,

For

For

By using identify

For

For

**Question3:**

Evaluate:

(i)

(ii)

**Answer**

(i)

(ii)