JEE Main 2019 Mathematics question
Not in JEE Main syllabus
If , then the number of values of x for which sin x − sin 2x + sin 3x = 0, is:
Answer: (A)
Solution
sin 2x(2cos x − 1) = 0 ⇒ x = 0, π/3.
Not in JEE Main syllabus
If , then the number of values of x for which sin x − sin 2x + sin 3x = 0, is:
sin 2x(2cos x − 1) = 0 ⇒ x = 0, π/3.