Find the value of cos-1(cos(4π3))+cos-1(cos(5π4))

Find the value of $\cos^{- 1} (\cos (\frac{4 π}{3})) + \cos^{- 1} (\cos (\frac{5 π}{4}))$

Matching exercise

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

step 1

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step 5