Tuesday
September 16, 2014

Homework Help: Trigonometry - Cosine of angle

Posted by Knights on Thursday, April 4, 2013 at 11:57am.

What is the cosine of the angle between two adjacent faces of a regular tetrahedron? (We define the angle between two intersecting planes as the angle between two intersecting lines, one in each plane, such that each line is perpendicular to the line at which the planes intersect.)

I don't understand....it is not cosine 60, so could someone help?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math - Someone please explain these! The angle between two planes is defined as ...
Math - Someone please explain these! The angle between two planes is defined as ...
Math - Someone please explain these! The angle between two planes is defined as ...
Algebra2--- - 1. An artist is designing triangular mirrors. Determine the number...
Algebra 2 .. - 1. An artist is designing triangular mirrors. Determine the ...
Algebra 2.... - 1. An artist is designing triangular mirrors. Determine the ...
maths - Which angle between 0 and 360 has the same cosine as the angle 58? ...
Maths - Could someone help me with this question please? Which angle between 0 ...
trigonometry - in triangle abc, angle c is a right angle, AC=8,Bc=15 and AB=17 a...
trigonometry - If sine of an angle is and cosine of an angle is 15/4.. find ...

Search
Members