Find tha value of cos(cos-1(45)+sin-1(45))

Find tha value of $\cos^{} (\cos^{- 1} (\frac{4}{5}) + \sin^{- 1} (\frac{4}{5}))$

Matching exercise

Match the items on the right to the items on the left.

step 1

step 2

step 3

step 4