Need help on Geometry question on triangle!

Question

anonymous · Answer

attachment

unklerhaukus · Answer

|dw:1365121154396:dw|

anonymous · Answer

I just dont know how to start on solving it

anonymous · Answer

its not a 30 60 90 triangle so...

unklerhaukus · Answer

$$\boxed{\sin\theta=\frac{\text{opposite side}}{\text{hypotenuse}}}$$

$$\sin(20°)=\frac{{\overline{RS}}}{1000 \text{ m}}$$

$${{\overline{RS}}}={1000 \text{ m}}\times\sin(20°)$$

anonymous · Answer

what does sin(20) mean

phi · Answer

it means you are doing trigonometry you might want to see http://www.khanacademy.org/math/trigonometry/basic-trigonometry/basic_trig_ratios/v/basic-trigonometry

unklerhaukus · Answer

The sine of an angle is a trigonometric function, which relates the sides of a right angled triangle to the angle

anonymous · Answer

so 90 degrees/ 1000

phi · Answer

If you have time, watch the video

trig is ratio of lengths of sides in a right triangle, but I would not try to learn it here.
We can answer specific questions.

anonymous · Answer

oh okay i will watch the video thanks

phi · Answer

After you get the basics, this one is pertinent to your problem http://www.khanacademy.org/math/trigonometry/basic-trigonometry/basic_trig_ratios/v/example--trig-to-solve-the-sides-and-angles-of-a-right-triangle