Question

solve cos x tan x - sin^2x=0 for all real values of x.

a. pi k, pi/2 + 2pi k
b. pi/2 + pi k, 2 pi k
c. pi/2 + 2 pi k, 3 pi/2 + 2pi k
d. pi k , pi/4 + 2pi k

Answer 1

solve 2 cos x - 1=0 for 0 <= x <2

a. pi/6 and 5pi/6
b. pi/3 and 5pi/3
c. pi/3 and 2pi/3
d. 7pi/6 and 11pi/6