Class 11th Maths – RD Sharma Chapter 9 : Value of Trigonometric Functions at Multiples and Submultiples of an angle – Exercise 9.1 Solutions (Step-by-Step Guide) Prove the following identities (1 – 27) : √((1 − cos 2x)/(1 + cos 2x)) = tan x Watch Solution sin 2x/(1 − cos 2x) = cot x
Class 11th Maths – RD Sharma Chapter 8 : Trigonometric Formulae – Very Short Answer Questions (VSAQs) Solutions (Step-by-Step Guide) If (cos α + cos β)² + (sin α + sin β)² = λ cos²( (α – β) / 2 ), write the value of λ. Watch Solution Write the value of sin π/12 sin 5π/12
Class 11th Maths – RD Sharma Chapter 8 : Trigonometric Formulae – Fill in the Blanks Type Questions (FBQs) Solutions (Step-by-Step Guide) The value of (sin 70° + cos 40°)/(cos 70° + sin 40°) is ………….. Watch Solution If tan(A + B) = p, tan(A – B) = q, then the value of tan 2A in
Class 11th Maths – RD Sharma Chapter 8 : Trigonometric Formulae – Multiple Choice Questions (MCQs) Solutions (Step-by-Step Guide) cos 40° + cos 80° + cos 160° + cos 240°= (a) 0 (b) 1 (c) 1/2 (d) -1/2 Watch Solution sin 163° cos 347° + sin 73° sin 167° = (a) 0 (b) 1/2 (c) 1
Class 11th Maths – RD Sharma Chapter 8 : Trigonometric Formulae – Exercise 8.2 Solutions (Step-by-Step Guide) Express each of the following as the product of sines and cosines: (i) sin 12x + sin 4x Watch Solution (ii) sin 5x − sin x Watch Solution (iii) cos 12x + cos 8x Watch Solution
Class 11th Maths – RD Sharma Chapter 8 : Trigonometric Formulae – Exercise 8.1 Solutions (Step-by-Step Guide) Express each of the following as the sum or difference of sines and cosines: (i) 2 sin 3x cos x (ii) 2 cos 3x sin 2x (iii) 2 sin 4x sin 3x (iv) 2 cos 7 x cos
Class 11th Maths – RD Sharma Chapter 7 : Value of Trigonometric Functions at Sum or Difference of Angles – Very Short Answer Questions (VSAQs) Solutions (Step-by-Step Guide) If α + β – γ = π, and sin²α + sin²β – sin²γ = λ sin α sin β cos γ, then write the value of
Class 11th Maths – RD Sharma Chapter 7 : Value of Trigonometric Functions at Sum or Difference of Angles – Fill in the Blanks Type Questions (FBQs) Solutions The maximum value of 3 cos x + 4 sin x + 5 is ……………………………………….. Watch Solution The minimum value of 4 cos x – 3 sin x
Class 11th Maths – RD Sharma Chapter 7 : Value of Trigonometric Functions at Sum or Difference of Angles – Multiple Choice Questions (MCQs) Solutions The value of sin²(5π/12) – sin²(π/12) is (a) 1/2 (b) √3/2 (c) 1 (d) 0 Watch Solution If A + B + C = π, then sec A (cos B cos C – sin
Class 11th Maths – RD Sharma Chapter 7 : Value of Trigonometric Functions at Sum or Difference of Angles – Exercise 7.2 Solutions Find the maximum and minimum values of each of the following trigonometrical expressions: (i) 12 sin x − 5 cos x Watch Solution (ii) 12 cos x + 5 sin x