1) Radius of the unit circle is a) r b) 1 c) 0.5 d) 10 2) x co-ordinates on the unit circle are equal to a) sin Ɵ b) cos Ɵ c) tan Ɵ 3) y co-ordinates on the unit circle are equal to a) sin Ɵ b) cos Ɵ c) tan Ɵ 4) In the first quadrant which trig ratio is positive? a) sin Ɵ b) cos Ɵ c) tan Ɵ d) all 5) In the second quadrant which trig ratio is positive? a) sin Ɵ b) cos Ɵ c) tan Ɵ d) all 6) In the third quadrant which trig ratio is positive? a) sin Ɵ b) cos Ɵ c) tan Ɵ d) all 7) In the fourth quadrant which trig ratio is positive? a) sin Ɵ b) cos Ɵ c) tan Ɵ d) all 8) 180 - Ɵ a) first quadrant b) second quadrant c) third quadrant d) fourth quadrant 9) 360 - Ɵ a) first quadrant b) second quadrant c) third quadrant d) fourth quadrant 10) 180 + Ɵ a) first quadrant b) second quadrant c) third quadrant d) fourth quadrant 11) sin 150 o a) positive b) negative 12) cos 235 o a) positive b) negative 13) tan 330 o a) positive b) negative 14) sin 90 o a) 0 b) 1 c) -1 15) cos 180 o a) 0 b) 1 c) -1 16) tan 270 o a) 0 b) 1 c) -1 d) undefined

Unit Circle

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