SOLUTION: 1-2cosL+cos2L= ?
L is alpha and please if anyone can explain it to me i would be grateful.
Algebra.Com
Question 136926: 1-2cosL+cos2L= ?
L is alpha and please if anyone can explain it to me i would be grateful.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
1-2cosL+cos2L= ?
-------------
1-2cos(alpha)+cos(2alpha) = ?
1-2cos(a) + cos^2(a)-sin^2(a)
1-2cos(a) + cos^2(a)-(1-cos^2(a))
1-2cos(a) + 2cos^2(a)-1
2cos^2a-2cos(a)
[2cos(a)](cos(a)-1)
====================
Cheers,
Stan H.
RELATED QUESTIONS
I do not understand polynomial notation. I somehow managed to get one of the questions... (answered by vleith,cooper81)
I asked this question a few days ago, but haven't received a response. Because I am... (answered by fractalier)
the question concerns the graph of the function f(x)=[x-3]+2
1. I need to explain... (answered by Theo)
If a population has a standard deviation σ of 5 units, what is the standard error of (answered by stanbon)
I am confused on how to find Y-hat. Can anyone please tell me how to do and maybe give me (answered by stanbon)
find the least integral upper bound of the zeros of the function {{{f(x)=x^3-x^2+1}}}... (answered by richard1234)
Hello, I found out that a fraction of : (7x+1)/(x+1)(x-2) simplifies as follows :... (answered by AAfter Search,J2R2R)
Hello night owls, if anyone can help me with this, I would be so grateful. I really want (answered by josgarithmetic)
Please help me with this problem. I am confused and am trying to learn how to solve this... (answered by jim_thompson5910,stanbon)