Assume that 0< x < pi/2 and 0< y < pi/2. find the exact value of cos(x+y) if cos x = 3/5 and cos y = 4/5.

a. 25/24

b. -25/24

c. 24/25

d. -24/25

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.

answer would be 8.64 or s = 11π/4 inches

step-by-step explanation:

s = r θ  

where s = arc length  

r = radius = 3 inches  

θ = central angle in radians = ( π /180)*165  

s = 3(π/180)*165  

= 8.64 inches

this is a good question! i'll do some research and come back when i have the answer!