Can someone help me on this Pre-Calculus trig problem? Having a rough time.
Favorites|Homepage
Subscriptions | sitemap
HOME > > Can someone help me on this Pre-Calculus trig problem? Having a rough time.

Can someone help me on this Pre-Calculus trig problem? Having a rough time.

[From: ] [author: ] [Date: 12-09-28] [Hit: ]
d) 10 deg. e) 1 deg.You just have to do one so that I know how to do the rest.I tried doing S=theta times r, but that doesnt give me the right answer. Im confused on how to do this.......
the distance between two points A and B on Earth is measured along a circle having center C at the center of Earth and radius equal to the distance from C to the surface. If the diameter of Earth is approximately 8,000 miles, approximate the distance between A and B if angle ACB has the indicated measure:

a) 60 deg. b) 45 deg. c) 30 deg. d) 10 deg. e) 1 deg.

You just have to do one so that I know how to do the rest.
I tried doing S=theta times r, but that doesn't give me the right answer. I'm confused on how to do this.

-
For s=rθ to work, θ needs to be in radians.
To convert degrees to radians, multiply the degrees by π/180.
radius = 1/2 diameter, so r = 4000.

a)

60 degrees = 60*π/180 = π/3

s = rθ = (4000)π/3 = 4189 miles
1
keywords: Can,Pre,this,someone,trig,Calculus,problem,Having,me,time,rough,help,on,Can someone help me on this Pre-Calculus trig problem? Having a rough time.
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .