What is expand cos(2)(x+pi/8) ?

The solution to expand cos(2)(x+pi/8) is cos(2)x+pi/8 cos(2)

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expand cos(2)(x+pi/8)

expand

cos (2) (x + \frac{π}{8})

cos (2) x + \frac{π}{8} cos (2)

Solution steps

cos (2) (x + \frac{π}{8})

Apply the distributive law:

a (b + c) = ab + a c

a = cos (2), b = x, c = \frac{π}{8}

= cos (2) x + cos (2) \frac{π}{8}

= cos (2) x + \frac{π}{8} cos (2)

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What is expand cos(2)(x+pi/8) ?
The solution to expand cos(2)(x+pi/8) is cos(2)x+pi/8 cos(2)