Answer:
440
Step-by-step explanation:
55x8. 8x5=40 carry the 4. 8x5=40+4=44 so it is 440
15x=1000 you get x=1000/15 which is approximately 67
Answer:
Step-by-step explanation:
OBTUSE......
Cos9x - cos5x = -2sin2x.sin7x
sin17x - sin3x = 2sin7x.cos10x
so f(x) =

=