Question

Find the exact value of sin1290

Answer 1

\[\sin 1290\]?

Answer 2

Keep subtracting 360 until the angle is between 0 and 360

Answer 3

Or divide by 360
=1,290 / 360 = 3.58333333
1,290 / 360 = 3 plus 210
So, you are to find the sine of 210 degrees

Answer 4

by using calculator you can find the exact value and also use MATLAB .. but f u want to find it without them! i think that u can divide it by (2*pi) (or 360) and you'll have it..

Answer 5

find directly the reference angle from calculator..then turn it into fraction...refer the number ratio at special angle...

Answer 6

\[\text{Sin}[\text{Mod}[1290,360]{}^{\circ}]=-\frac{1}{2} \]