Let f(x) = A sin ((2pi/B)*X)

.The graph of this function has a tangent line with a slope of 4

at the point (B/8 , 1)

find the exact values of a and b

so for a i put in B/8 for x and 1 for y and cancled out the b's and got

a= 1/sin(pi/4)

then for b do i find the derivative and make that = 4?

or is b infinate?