Answer:
Step-by-step explanation:
sec (-x)-sin (-x) tan (-x)=cos x
sec(x)-(-sin x)(-tan x)=cos x
1/cos x-sin x(sin x/cos x)=cos x
multiply by cos x
1-sin ²x=cos²x
or 1=sin²x+cos²x
which is true.
Use Pythagorean theorem
a^2 + b^2 = c^2
C = hypothenuse
8^2 + b^2 = 15^2
64 + b^2 = 225
b^2 = 161
b = square root 161 = 12.68
Solution: 12.7 cm
Answer:
B (for question 7)
Step-by-step explanation:
To find the slope, we use the equation 
.
m = (-4+1)/(7+2) = -3/9 = -1/3
Since B is the only option that would give a slope of -1/3, B must be the answer.
(you can use this same method for question 8)
The small tin has a better value or deal
On average, a tapped maple will produce 10 to 20 gallons of sap per tap.
1/4
This answer is attached to a image, which has options: 1/4, 3/8, 5/8, 1.
So, the option that express the least amount of sap is the first one.
<em>-Rin</em>
