posted by Jason on .
Can someone check these for me? Please?
Use half-angle identity to find the exact value of cos165 degrees.
Write the equation 2x+3y-5=0 in normal form.
(-2sqrt(13)/13)x- (3sqrt(13)/13)y+ (5 sqrt (13)/13) = 0
Find the distance between the lines with equations 3x-y=9 and y=3x-4.