Question 877143
If cos &#920; = square root 2 over 2 and 3 pi over 2 < &#920; < 2&#960;, what are the values of sin &#920; and tan &#920;?
{{{cosx=sqrt(2)/2}}}, Interval, (3pi/2 < x < 2pi)
x=7pi/4
{{{sinx=-sqrt(2)/2}}}
tanx=sinx/cosx=-1