Cos9x - cos5x = -2sin2x.sin7x
sin17x - sin3x = 2sin7x.cos10x
so f(x) =

=
ITS MUltipling by 3 silly its 243
Answer:
20
Step-by-step explanation:
- You can set this up in an algebraic equation:
- .09x=5 which translates to 9% times a variable or unknown number equals 5
- Divide both sides by .09 which turns to 55.5
- Multiply by .36 to find 36% of that number which equals 20
You multiply 8 times 5 then add 3. So it's 43/8
The answer is going to be divide. hope that helped