Home › AP EAMCET › Mathematics › Trigonometry: Trigonometric Equations › Which pair solves 2cos x + √3 = 0 for x in [0, 2…
Which pair solves 2cos x + √3 = 0 for x in [0, 2π]?
Aπ/3 and 5π/3
B5π/6 and 7π/6
Cπ/6 and 11π/6
D2π/3 and 4π/3
Answer & Solution
Correct answer: B. 5π/6 and 7π/6
The equation gives cos x = -√3/2, which holds in the second and third quadrants at 5π/6 and 7π/6.
Related questions
Who introduced the tangent function to Europe in 1467 through trigonometry tables?Which statement about tan(x + kπ) for any integer k is correct?The zeros of the sine function are all integer multiples of which number?A general periodic function can be written as a sum of sine and cosine waves. What is thisWhich scholar proved in 1682 that sin x is not an algebraic function of x?Which Danish mathematician introduced the terms tangent and secant in 1583?Which identity correctly shifts sine by a quarter turn?Which function has vertical asymptotes at every integer multiple of π?