Answer:
<u>Trigonometric ratios</u>

where:
is the angle- O is the side opposite the angle
- A is the side adjacent the angle
- H is the hypotenuse (the side opposite the right angle)
To find sin x and cos y, we must first find the length of the <u>hypotenuse</u> (PO) of the given right triangle.
To do this, use <u>Pythagoras' Theorem:</u>

Given:




Using the found value of the hypotenuse and the trig ratios quoted above:


Therefore, 
Answer:
-39x^2 + 17x
Step-by-step explanation:
= 5x - 60x^2 + 3 (4x+7x^2)
= 5x - 60x^2 + 12x + 21x^2
= -39x^2 + 17x
Answer:
Independent
Step-by-step explanation:
with replacement the total number of tiles will always remain the same,i.e the sample size will not be changed. so the events are independent.
The area of the circle is given as:

Plugging the value of the radius we have that:

Therefore the area in terms of pi is:
Answer:
y= 4x-9
Step-by-step explanation: