Answer:

Step-by-step explanation:
Given : 
We have to write which identity we will use to prove the given statement.
Consider 
Take left hand side of given expression 
We know

Comparing , we get, a= 180° and b = q
Substitute , we get,

Also, we know
and 
Substitute, we get,

Simplify , we get,

Hence, use difference identity to prove the given result.
Answer:
it should be 4.24264068712 looked it up
Answer:
3.374
Step-by-step explanation:
















=3.374
Some fractions are 6/8, 9/12 and 12/16
All you have to do is multiply a number by the numerator and denominator