In triangle JKL, tan(b) = 3/4 and sin(b) = 3/5. If triangle JKL is dilated by a scale factor of 3, what is cos(b)?

a. cos (b) = 3/5

b. cos (b) = 4/5

c. cos (b) = 5/3

d. cos (b) = 5/4

thanks