Step-by-step explanation:
The cosine function, along with sine and tangent, is one of the three most common trigonometric functions. In any right triangle, the cosine of an angle is the length of the adjacent side (A) divided by the length of the hypotenuse (H). In a formula, it is written simply as 'cos'.
In any right angled triangle, for any angle:
The sine of the angle = the length of the opposite side
the length of the hypotenuse
The cosine of the angle = the length of the adjacent side
the length of the hypotenuse
The tangent of the angle = the length of the opposite side
the length of the adjacent side
So in shorthand notation:
sin = o/h cos = a/h tan = o/a
Often remembered by: soh cah toa
Answer:
0.5
Step-by-step explanation:

Hope this helped :)
The median of this problem is 84
Answer:
D
Step-by-step explanation:
Remember that the formula for the area of a rectangle is:

Where l is the our length and w is our width.
If we increase our length by 20%, this means that we add 20% or 0.2 of our old length to our old length. So, our new length will be:

Combine like terms:

Similarly, if we increase our width by 10%, this means that we add 10% or 0.1 of our old width to our old width. So, our new width is:

Combine like terms:

Therefore, our new area will be:

Substitute 1.2l and 1.1w. This yields:

Multiply:

Our old area is:

So, our area increased by a factor of 1.32.
This is the same as 32% of our old area.
So, our answer is D.
And we're done!
Answer:
Below.
Step-by-step explanation:
The difference of the f(x) values divided by the difference in the corresponding x values.
That would be (f(2) - f(-2)) / (2 - (-2))