Double angle identity for sine:


Factorize the left side.

Pythagorean identity:


so that

Answer:

Step-by-step explanation:
Area of a circle with radius
: 
Circumference of a sector with radius
: 
Area of sector with angle
:
.
Arc length of sector with angle
: 
Using these equations, we get the following information:
Area of circle: 
Circumference of a circle: 
Area of sector: 
Arc length of sector: 
Answer:
C: Both saving and investing
Step-by-step explanation:
You need to save money in order to have money to invest
Answer:
prime numbers
Step-by-step explanation:
not composite since,example, 2 is prime
not even since,example, 19 is odd
not odd since,example, 2 is even