Question

find exact value of sin(-pi/3) w/o calculator

Answer 1

you would have to pythag out an equilateral triangle

Answer 2

sin -x = -sin x
sin pie/3 = sin 60 degrees

http://www.google.co.in/imgres?um=1&sa=N&biw=1024&bih=677&hl=en&tbm=isch&tbnid=k6GxsGs3Esla7M:&imgrefurl=http://library.thinkquest.org/20991/alg2/trig.html&docid=2tGM3v3z0255kM&imgurl=http://library.thinkquest.org/20991/media/alg2_table.gif&w=384&h=298&ei=1iwmUrCDNrGZiAfM-ICACA&zoom=1

Answer 3

is it - sqrt3/2

Answer 4

correct

Answer 5

if i was not looking at my unit circle, how would I do this

Answer 6

\[\sin \left( -\theta \right)=-\sin \theta \]
in 1st all the t- ratios are positive
sin and cosec is positive in 1st and 2nd quadrants
in 3rd quadrant only tan and cot are positive.
In 4th quadrant only cos and sec are positive.