Question

for what part of the interval [-pi, pi] is y= -2 sin x decreasing??
a. [-pi/2, pi/2]
b. [-pi/3, pi/3]
c. [-pi/4, pi/4]
d. [-pi, 0]
e. [-pi, pi]
PLEASE HELP AND SHOW ALL STEPS!

Answer 1

Are you in calculus? If so, try using derivatives. If not, then try doing the graph, and seeing what the picture shows you.

Answer 2

can you show how to do the derivatives