What is mzm?

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He expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. if the length is fraction 2 over 3 unit and the width is fraction 1 over 3 unit, what is the perimeter of the rectangle in units? fraction 2 over 3 unit 1 unit 1fraction 2 over 3 units 2 units

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Find the solution of each of the following.