# CBSE Class 10-Mathematics: Chapter –8 Introduction to Trigonometry Part 3

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**Question 12:**

**Answer:**

**Question 13:**

If what is the value of .

**Answer:**

**Question 14:**

What is the value of in terms of

**Answer:**

**Question 15:**

If find

**Answer:**

## 2 Mark Questions

**Question 1:**

In , right angled at , . Determine:

(i)

(ii)

**Answer:**

Let us draw a right-angled triangle ABC, right angled at B.

Using Pythagoras theorem,

(i)

(ii)