inequality sign..
hey
when you have pi/4 > arccosx, why does the inequality sign changes when moving the arccos the other side to: cos(pi/4) < x??
when you have pi/4 > arccosx, why does the inequality sign changes when moving the arccos the other side to: cos(pi/4) < x??
(edited 13 years ago)
Original post by spontaneousma
hey
when you have pi/4 > arccosx, why does the inequality sign changes when moving the arccos the other side to: cos(pi/4) < x??
when you have pi/4 > arccosx, why does the inequality sign changes when moving the arccos the other side to: cos(pi/4) < x??
Assuming you're restricted to the interval 0 to pi, or smaller. Since cos is decreasing on the interval then.
IF x > y
Cos x < cos y.
Original post by ghostwalker
Assuming you're restricted to the interval 0 to pi, or smaller. Since cos is decreasing on the interval then.
IF x > y
Cos x < cos y.
IF x > y
Cos x < cos y.
thank you!
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