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

=
Answer:
B
Step-by-step explanation:
distribute 1/2 into 2x and 4, if both sides match then its infinitely many solutions !
Hi!
Add the student together to get the number of students
10+4 = 14
Divide the girls by half
4/2 = 2
2/14 is the answer for this question.
<em>Hope this helps! Have an amazing day <3</em>
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I hope this helps you
9+9+1
9 (1+1)+1
9.2+1
18+1
19