Math help last time?

Question

Last one for reals

Find

Sin (pi)

answr choices

1/2radical(3)

-1/2Radical(3)

1/2radical(2)

0

-1/2

none opf the above

HURRY ty

Answer 1

You need to remember your unit circle when taking trig functions of multiples of pi. This article explains the unit circle pretty well

http://en.wikipedia.org/wiki/Unit_circle

under the section trigonometric functions on the unit circle.

All you do it you think of the point (1,0) on the positive x-axis as 0 radians, and a full circle as 2pi radians. Starting from there, you travel pi radians counterclockwise along the circumference, so half the circle, to the point (-1,0). When using the unit circle, all you have to know is that cosine of the angle you traveled is the x-coordinate, and sine of the angle is the y-coordinate. Since you ended up at the point (-1,0) which has y-coordinate 0, you know that sin(pi) = 0.

Hope this helps.

Answer 2

sin (3.14) would be = 0.054775909

Hope that helped!

Answer 3

1. ween teech yuze "pi", it impli angel is in radians.

2. full serkel=2 pi radians, so pi=180 degrees=1/2 serkel

sine(pi)=sine(0)=0

Answer 4

yeah, sin (3.14) equals 0.054775909