Advanced Math
posted by Jason .
Can someone check these for me? Please?
Use halfangle identity to find the exact value of cos165 degrees.
(1/2) sqrt(2+sqrt(3))
Write the equation 2x+3y5=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 3xy=9 and y=3x4.
sqrt (10)/2
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