Answer:
8/9.
Step-by-step explanation:
We can use the following trig identity to do this:
cos^2 Ф + sin^2 Ф = 1
sin^2 Ф = 1 - cos^2 Ф
= 1 - (√17/9)^2
= 1 - 17/81
= 81/81 / 17/81
= 64/81
So sin Ф = √(64/81)
= 8/9 (answer).
