for what value of x, the cos(cos-1(45)+sin-1(45)) holds.

for what value of x, the $\cos^{} (\cos^{- 1} (\frac{4}{5}) + \sin^{- 1} (\frac{4}{5}))$ holds.

Matching exercise

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

step 1

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step 5