Answer:
Step-by-step explanation:
![\dfrac 12 \left[\sin(a+b)+\sin(a-b) \right]\\\\\\=\dfrac 12\left[ 2 \sin a \cos b\right]\\\\\\=\sin a \cos b](https://tex.z-dn.net/?f=%5Cdfrac%2012%20%5Cleft%5B%5Csin%28a%2Bb%29%2B%5Csin%28a-b%29%20%5Cright%5D%5C%5C%5C%5C%5C%5C%3D%5Cdfrac%2012%5Cleft%5B%202%20%5Csin%20a%20%5Ccos%20b%5Cright%5D%5C%5C%5C%5C%5C%5C%3D%5Csin%20a%20%5Ccos%20b)
Answer:
10?
Step-by-step explanation:
I don't know exact answer
Answer:
Nesesito ayuda sobre estas dos preguntas la1 y la ocho pero tiene que tener sentido con las demas
Step-by-step explanation:
Answer:
I am willing to help, just send your problems in the comments!
Step-by-step explanation:
You can send the problem in the comments or create a separate question.
Answer:
x = 1 ; y = -5
Step-by-step explanation:
2x + 5y = -23 --------------(i)
5x + 13y = -60 ----------(ii)
(i)*5 10x + 25y = - 115
(ii)*(-2) <u>-10x - 26y = 120 </u> {add the two equations}
-1y = 5 {Now x is eliminated}
y = 5/-1
y = -5
y = -5 in equation (i)
2x + 5*(-5) = -23
2x - 25 = -23
2x = -23 +25
2x = 2
x = 2/2
x = 1
