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

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

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simplify cos(x)cos(y)-sin(x)sin(y)

simplify

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

cos (x + y)

Solution steps

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

Use the Angle Sum identity:

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

= cos (x + y)

\frac{10}{5} + \frac{5}{7}

4 a^{6} - 1

4^{- 4} \cdot 4^{4}

\frac{31}{7}

\frac{5}{6} + \frac{5}{8}

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