Question 743938
What is the value of csc (-19pi/3)?
(-19π/3)=(-18π/3-π/3)=(-6π-π/3)=3(2π) revolutions +π/3 clockwise.
you are working with a reference angle, &#960;/3 in quadrant IV where csc and sin<0
csc (-19pi/3)=-csc(&#960;/3)=1/-sin(&#960;/3)=1/-(&#8730;3/2)=-2/&#8730;3=-2&#8730;3/3