JEE Main 2019 Mathematics question

Mathematics Trigonometric Equations JEE Main 2019

Not in JEE Main syllabus

All the pairs (x, y) that satisfy the inequality also satisfy the equation:

(A)sin x = |sin y|Correct
(B)sin x = 2 sin y
(C)2 sin x = sin y
(D)2|sin x| = 3 sin y

Answer: (A)

Solution

; LHS ≥ 2 ≥ RHS ⇒ sin x = 1 and .

Question ID VK-009899