SOLUTION: I'm not exactly sure on how to start this problem. Thank you in advance for your help!!
find the acute angle of rotation x that eliminates the xy term of 2x^2 + sqrt3*xy + y^2 - 8
Algebra.Com
Question 860522: I'm not exactly sure on how to start this problem. Thank you in advance for your help!!
find the acute angle of rotation x that eliminates the xy term of 2x^2 + sqrt3*xy + y^2 - 8 = 0
a-28.1 degrees
b-30
c-45
d-60
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find the acute angle of rotation x that eliminates the xy term of
2x^2 + sqrt3*xy + y^2 - 8 = 0
A = 2 ; B = sqrt(3) ; C = 1
-----
cot(2t) = (A-C)/B = (2-1)/sqrt(3) = 1/sqrt(3)
tan(2t) = sqrt(3)
2t = 60 degrees
t = 30 degrees
-------------------------
Answer: b
Cheers,
Stan H.
======================
a-28.1 degrees
b-30
c-45
d-60
RELATED QUESTIONS
I need some help figuring out the steps to solve this problem.
Find, to the nearest... (answered by stanbon)
M is the midpoint of segment PQ. Find PQ if PM = 5x+3 and MQ = 2x+12
I am not sure how (answered by ewatrrr)
Good morning!
Alas... in need of help on a very simple problem.
tan^2(3x) = 3
I am... (answered by Gogonati)
Draw a right triangle with legs of length 3 cm and 8 cm. Use your triangle to estimate... (answered by josgarithmetic)
Hello, my question is this:
How exactly do I find the EXACT value of csc 11pi/2 without... (answered by solver91311)
Hi, I have to solve for y in terms of x with this problem log6Y = LOG6 4- Log6 X
I'm not (answered by mathie123)
Solve the following equation for x:
3^2^x =15
not sure how to solve this. Ive been (answered by Earlsdon)
Hello! I have a problem that I'm not sure of:
The measure of angle D is 5 times the... (answered by rfer)
I'm not sure where to start with this proof i'll show you what I have so far but i am not (answered by elima)