Class 11th Maths – RD Sharma Chapter 8 : Trigonometric Formulae – Very Short Answer Questions (VSAQs) Solutions (Step-by-Step Guide)

1. If (cos α + cos β)² + (sin α + sin β)² = λ cos²( (α – β) / 2 ), write the value of λ. Watch Solution
2. Write the value of sin π/12 sin 5π/12 Watch Solution
3. If sin A + sin B = α and cos A + cos B = β, then write the value of tan((A + B)/2) Watch Solution
4. If cos A = m cos B, then write the value of cot((A + B)/2) cot((A – B)/2) Watch Solution
5. Write the value of the expression (1 – 4 sin 10° sin 70°) / (2 sin 10°) Watch Solution
6. If A + B = π/3 and cos A + cos B = 1, then find the value of cos((A – B)/2) Watch Solution
7. Write the value of sin π/15 sin 4π/15 sin 3π/10 Watch Solution
8. If sin 2A = λ sin 2B, then write the value of (λ + 1)/(λ – 1)  Watch Solution
9. Write the value of (sin A + sin 3A)/(cos A + cos 3A) Watch Solution
10. If cos (A + B) sin (C – D) = cos (A – B) sin (C + D), then write the value tan A tan B tan C. Watch Solution

Chapter 8: Transformation Formulae – R. D. Sharma Class 11th Maths

1. Transformation Formulae Exercise 8.1 Video Solution

2. Transformation Formulae Exercise 8.2 Video Solution

3. Transformation Formulae Multiple Choice Questions (MCQs) Video Solution Video Solution

4. Transformation Formulae Fill in the Blanks (FBQs) Video Solution

5. Transformation Formulae Very Short Answer Questions (VSAQs) Video Solution Video Solution