What is expand cos(x)(cos(y)-1)-sin(x)sin(y) ?

The solution to expand cos(x)(cos(y)-1)-sin(x)sin(y) is cos(x+y)-cos(x)

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expand cos(x)(cos(y)-1)-sin(x)sin(y)

expand

cos (x) (cos (y) - 1) - sin (x) sin (y)

cos (x + y) - cos (x)

Solution steps

cos (x) (cos (y) - 1) - sin (x) sin (y)

Expand

cos (x) (cos (y) - 1) : cos (x) cos (y) - cos (x)

= cos (x) cos (y) - cos (x) - sin (x) sin (y)

Use the Angle Sum identity:

cos (s) cos (t) - sin (s) sin (t) = cos (s + t)

= cos (x + y) - cos (x)

x^{2} \cdot sin (u s) (x + y^{2})

(\frac{3}{2 x ^{3}} - 6 y) (\frac{3}{2 x ^{3}} + 6 y)

, f (x - 6)

(x + \frac{1}{2}) x

\frac{d ^{2}}{d x ^{2}} ((y (x, C)) (C e^{- x} + C e^{2 x}))

What is expand cos(x)(cos(y)-1)-sin(x)sin(y) ?
The solution to expand cos(x)(cos(y)-1)-sin(x)sin(y) is cos(x+y)-cos(x)