How would you know when to use Sine law?

You can use Sine Law if:

• You are given Side Angle Side (SAS)




• You are given Side Angle Angle (SAA)

here is the formula:

FINDING GCF



Greatest Common Factor

To find the greatest common factor:

1. Determine if there is a common factor of the numbers.


2. Divide both of the numbers by this common factor.
   
   * If there are no common prime factors, the GCF is 1.

Example:
12m² + 6mn + 3n²

Step 1:
12m² = 3.2.2.m.m
6mn = 3.2.m.n
3n² = 3.n.n

(All have "3" in common)
GCF : 3

Step 2:
3 ( 4m² + 2mn + n² )

Usually you can find the Greatest Common Factor fairly easily by experimenting with possible divisors:

Start with the smaller number; it is the largest divisor of itself. Is it a divisor of the larger number? If so, you have the G.C.F.; if not: What is the next-largest divisor of the smaller number; is IT a divisor of the other number? Continue until you find a number that will divide into BOTH. Sometimes only the number '1' will work as a common divisor; for example: 21 and 16 have no common factor other than 1.