SOLUTION: Trigonometry help please?
show that cos(A-B)-cos(A-B)=2 sinA sin B.
Using coumpand angle and indenty for cos.
Anybody have an idea how to solve that question?
Cheers a
Algebra.Com
Question 728187: Trigonometry help please?
show that cos(A-B)-cos(A-B)=2 sinA sin B.
Using coumpand angle and indenty for cos.
Anybody have an idea how to solve that question?
Cheers all...
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
show that cos(A-B)-cos(A-B)=2 sinA sin B.
---
"show that..." implies you want to confirm an identity.
But, cos(A-B)-cos(A-B) = 0
--------
Using coumpand angle and indenty for cos.
------
Then you say, "solve that question?"
Questions are answered.
Equations are solved.
-------------
Try again. Make it clear what you want to do.
RELATED QUESTIONS
Hello,
Please help me solve this problem with trigonometry,
The question is to... (answered by Alan3354,lynnlo)
Using a double-angle or half-angle formula to simplify the given expressions.
if... (answered by greenestamps)
Hello,
If {{{ cos a }}} = {{{ tan b }}} and {{{ cos b = tan a }}}, where a and b are... (answered by stanbon)
Prove that:
(sin a cos b+cos a sin b)^2+(cos a cos b-sin a sin b)^2 =... (answered by solver91311)
Hi,
given cos(A+B)= cos A cos B - sin A sin B, Find... (answered by ewatrrr)
if sinA+cosB=2 . find the sin(2A+B/3) ?
solution is... (answered by stanbon)
Hi,
I have the following answer;... (answered by ewatrrr)
sin(A+B) = sin A cos B + cos A sin B
cos(A+B) =... (answered by vleith)