Question

Double check my answers please :)

f(x)=asinx+b

f(pi/2)=2
f(3pi/2)=-8

find a and b

is a=5 and b=-3?

Answer 1

Yes

Answer 2

Ok, the second part of the equation is to place f(x) =0
and get two answers of x in radians.

I got the first one as 0.6435, but how do I get the second one?

Answer 3

π - the answer you get

Answer 4

What would it be for cos then?

Answer 5

sin (180 -x) = sinx

Answer 6

why?

Answer 7

2pi-answer for cos?

I just want to see the difference.