Yes because 1.2 is the same as 1.20 it's just that you removed the 0
Answer:
cosA + sinA
Step-by-step explanation:
Using trig. identities :
cos(A + B) = cosAcosB - sinAsinB
cos2A = cos²A - sin²A
cos2A = (cosA + sinA)(cosA - sinA)
Therefore, your question is :
=> cos2A/(cosA - sinA)
=> (cosA + sinA)(cosA - sinA)/(cosA - sinA)
=> cosA + sinA
Answer:
897 liters
Step-by-step explanation:
The motor oil is composed of 8 liters of natural oil and 5 liters of synthetic oil. This means there is a ratio of 8/5. We have 552 liters of natural oil to y liters of synthetic. This is the ratio 552/y. Create a proportion that compares the two ratios.
![\frac{8}{5}=\frac{552}{y}](https://tex.z-dn.net/?f=%5Cfrac%7B8%7D%7B5%7D%3D%5Cfrac%7B552%7D%7By%7D)
Solve by cross multiplying.
8y = 5(552)
8y = 2,760
y= 345
345 liters of synthetic oil.
Together 552+345= 897 liters of motor oil.
<span>5(x-3)= 7x-2(x+)1
5x - 15 = 7x - 2x + 1
5x - 15 = 5x + 1
-5x -5x
- 15 = 1
NO SOLUTIONS because -15 is not equal to 1 </span>