Answer:
cos(x-30)=1/2
Step-by-step explanation:
We use the following relationship to obtain cos(x)
From that, we have that cos(x)= sqrt(1-1/4)=sqrt(3) / 4
To obtain the value of cos(x-30), lets remember the following expression:
Therefor, we can use that to obtain our desired function cos(x-30)
cos(x)*cos(30)+sin(x)*sin(30)
=2/4=1/2
Answer:
Option 3 2 and 5
Step-by-step explanation:
Can you check your question please
(2×3)^2
=6^2
=36
5^2
=25
Answer: 67.5
Step-by-step explanation:
Given: The mass of drug = 450 mg
The mass percent error = 15%
Which can be written as 0.15.
We use the formula :-
Similarly, 
Hence, the mass error would be 67.5 mg.
Answer:
y = 1.4x - 28/5
Step-by-step explanation:
slope intercept form: y = mx + b
m - slope
b - y-intercept
slope = rise/run
slope = 7/5
y-intercept - point at which the x-coordinate is 0
0 = 7/5 * 4 + b
0 = 28/5 + b
-28/5 = b
plug in
y = 7/5x - 28/5
simplify
y = 1.4x - 28/5
