SOLUTION: What is the vlaue of 4cos75 ° cos15 °?

Algebra.Com
Question 1038822: What is the vlaue of 4cos75 ° cos15 °?
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
What is the vlaue of 4cos75 ° cos15 °?
--------
= 4sin(15)*cos(15)
= 2sin(30)
= 1

RELATED QUESTIONS

The average (arithmetic mean) of the test scores of Mrs. Hilgarts's first period class of (answered by stanbon)
Without using tables find the values of (a) (tan69° + tan66°)/(1 - tan69°tan66°)... (answered by ikleyn)
Find the exact value of the following. cos60°cos15° +... (answered by Boreal)
Find the exact value:... (answered by alakazam2192)
Cos75+cos15 (answered by tommyt3rd)
cos15 - cos75 = sin pi/8 sin pi/3 sin pi/4 sin pi/6 How do you solve this? The... (answered by ikleyn)
Use the half-angle formula to find the function value: cos15 PLEASE HELP... (answered by robertb)
solve cos15 without using... (answered by lwsshak3)
A plane flew 1200 kilometers north. It then changed direction by turning 15 degrees... (answered by Alan3354)