Hi there!
To solve, we must use the following trig identity:
sin(u - v) = sin(u)cos(v) - sin(v)cos(u)
We can rewrite the left hand side of the equation as:

Split the fraction:

First fraction reduces to 1:

Simpify each with common arguments:

Answer:
This answer is A
A. X= -1
Step-by-step explanation:
-1 is equal to-1
The answer is f because it equals 1/3 and f is 1/3
Answer:
3643
Step-by-step explanation:
Answer:
1 to 2
Step-by-step explanation:
If A answers 1 question, B will answer 2 questions, making the ratio 1 to 2