posted by Sophie on .
For 4x^2 - 4xy + y^2 = 4 find θ, the angle of rotation about the origin, to the nearest degree?
I got A, is this right?
I had -26.6 or 333.4 in a positive direction
tan 2θ = B/(A-C)
= -4/(4-1) = -4/3
2θ = -53.13
θ = -26.13
oh, so it is C?
has to be
didn't you also get -26.6 degrees?
that is not given.
What angle is coterminal with -26.6 ?
It is 333.4 .
Here is a webpage that has your type of question
press "STEP" to go through the problem.
Notice they leave their angle as a negative.
oohh yes i did! thanks!!