What is cos(a)cos(b)-sin(a)sin(b) ?

The solution to cos(a)cos(b)-sin(a)sin(b) is cos(a+b)

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simplify cos(a)cos(b)-sin(a)sin(b)

simplify

cos (a) cos (b) - sin (a) sin (b)

cos (a + b)

Solution steps

cos (a) cos (b) - sin (a) sin (b)

Use the Angle Sum identity:

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

= cos (a + b)

\frac{7}{2 + 3}

3 (\frac{1}{3} x + 7) - 7

(5 x^{2} + 7) - (3 x - 2)

\frac{x ^{2} + 8 x + 15}{x - 4} \cdot \frac{x ^{2} - 16}{2 x + 6}

\frac{( x + 5 ) ^{2} - ( x - 5 ) ^{2}}{2 x}

What is cos(a)cos(b)-sin(a)sin(b) ?
The solution to cos(a)cos(b)-sin(a)sin(b) is cos(a+b)