Question

find the value, sin(cos^-1(radical2/2)) im lost, just need a hint of how to go about this problem i.e. set it up

Answer 1

cos^-1 means the inverse cosine, the angle x such that cos(x)= sqrt(2)/2

There are a few angles it is good to memorize their sin,cos, and tan
in degrees: 0,30,45,60,90 where in order sin,cos,tan we get
0,1,0
1/2, sqrt(3)/2 , 1/sqrt(3)
sqrt(2)/2, sqrt(2)/2, 1
sqrt(3)/2,1/2, sqrt(3)
1,0,undf