Home › CBSE Class 11 (Commerce) › Mathematics › Trigonometric Functions › If sin x = 3/5 with x acute, what is sin 2x?
If sin x = 3/5 with x acute, what is sin 2x?
A6/5
B24/25
C7/25
D12/25
Answer & Solution
Correct answer: B. 24/25
cos x = 4/5, so sin 2x = 2 x (3/5)(4/5) = 24/25.
Related questions
Inside (0, π/2), the angle where tan x equals its own reciprocal isThe least positive root of the equation sin 2x = sin x isAdding every root of 2 sin x cos x = sin x on [0, π] givesBetween 0 and 2π inclusive, how many angles satisfy sin 2x = 1?Solving sin x = sin α completely, with n an integer, givesTangent takes positive values in which pair of quadrants?A point has sine 3/5 and sits in the second quadrant; its cosine isHalving the angle inside a cosine stretches its repetition length to