Wednesday

January 28, 2015

January 28, 2015

Posted by **Gabby** on Sunday, January 13, 2013 at 9:49pm.

- Pre-Calculus -
**Reiny**, Sunday, January 13, 2013 at 10:04pmLooks like the angle at B is 150° and we can just use the cosine law:

AC^2 = 12^2 + 9^2 - 2(12)(9)cos 150°

= 225 - 216( -√3/2)

= ....

AC = + √ .....

I got AC = appr 20.3

**Answer this Question**

**Related Questions**

Math - Point B is 10 KM north of Point A and Point C is 10 Km from B on a ...

Math - Point B is 10 KM north of Point A and Point C is 10 Km from B on a ...

Math - Point A is 15 miles directly north of point B. From point A, point C is ...

geometry - A cross country race course on flat ground has runners heading from ...

Mathematics - A pilot flies a plane that averages approximately 210 km/hr. The ...

math - Dave walked from point A to point B due North East for a distance of 20m...

math - Dave walked from point A to point B due North East for a distance of 20m...

trigonometry - Hal walked from point A to point B due north east from a distance...

Pre cal - 1. An airplane flies 200 km on course 110 degrees from point A to ...

Physics - Find the distance light travels from its starting point, S to its ...