Answer:

Step-by-step explanation:
Given

Required
Use the expression to prove a trigonometry identity
The given expression is not complete until it is written as:

Going by the Pythagoras theorem, we can assume the following.
- a = Opposite
- b = Adjacent
- r = Hypothenuse
So, we have:


Having said that:
The expression can be further simplified as:

Substitute values for sin and cos
becomes

Answer:
162 ft^2
Step-by-step explanation:
18 * 18 = 324
324/2 = 162
The area of the patio is 162 square feet
-10 - (-8) + (-4) - 20
When subtracting a negative, you add the number.
When adding a negative, you subtract the number.
-10 + 8 - 4 - 20
Do addition and subtraction from left to right.
When adding a negative to a positive, keep the sign of the larger number.
When subtracting from a negative, you add the numbers together and keep the negative sign.
-10 + 8 - 4 - 20
-10 + 8 = -2
-2 - 4 = -6
-6 - 20 = -26
Answer:
32,400
Step-by-step explanation:
180 * 180 + calculator = 32,400
Answer:
First is x-10=y Second is x/4=y
Step-by-step explanation: