# CBSE Class 10-Mathematics: Chapter – 8 Introduction to Trigonometry Part 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Question 7**:

If prove that .

**Answer**:

**Question 8**:

If A, B are acute angles and , then find the value of .

**Answer**:

**Question 9**:

(a) Solve for , if

**Answer**:

(b) Solve for if .

**Answer**:

**Question 10**:

If show that

**Answer**:

LHS

**Question 11**:

If prove that

**Answer**:

P. T