If ^ -1 x- ^ -1 y 2 = , then 4 x 2 – 4 xy cos α + y 2 is equal to
Mathematics · JEE Main · NTA Exams — Trigonometry
If \(\cos ^{-1} x-\cos ^{-1} \frac{y}{2}=\alpha,\)then 4x2 – 4xy cosα + y2 is equal to
- 4
- 2sin2
α - –4sin2
α - 4sin2
α
Answer
(D) 4sin 2 α
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- For a regular polygon, let r and R be the radii of the inscribed and the circumscribed circles. A false…
- The value of ^ -1 [ 1+x^ 2 + 1-x^ 2 1+x^ 2 - 1-x^ 2 ], |x|< 1 2 , x 0, is equal to
- If ^ -1 [( )^ 1 2 ]+ ^ -1 [( )^ 1 2 ]=x , then sin x =
- Which of the following when simplified does not reduce to unity ?
- Given b+c 11 = c+a 12 = a+b 13 for a ABC with usual notation. If A = B = C , then the ordered triad (α, β, )…
- The possible values of θ ∈ (0, π) such that sin (θ) + sin (4θ) + sin (7θ) = 0 are
- ABCD is a trapezium such that AB and CD are parallel and BC ⊥ CD. If ∠ADB = θ, BC = p and CD = q, then AB is…
- Let S = x R : 0 If n ( S ) denotes the number of elements in S then