What is the value of cos((3pi)/2)cos(pi)-sin((3pi)/2)sin(pi) ?

The value of cos((3pi)/2)cos(pi)-sin((3pi)/2)sin(pi) is 0

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cos((3pi)/2)cos(pi)-sin((3pi)/2)sin(pi)

cos (\frac{3 π}{2}) cos (π) - sin (\frac{3 π}{2}) sin (π)

0

Solution steps

cos (\frac{3 π}{2}) cos (π) - sin (\frac{3 π}{2}) sin (π)

Rewrite using trig identities:

cos (\frac{π}{2})

= cos (\frac{π}{2})

Use the following trivial identity:

cos (\frac{π}{2}) = 0

= 0

\frac{2 - 2 + 2 cos ( 8 0 ^{\circ} )}{sin ( 4 0 ^{\circ} )}

\frac{4}{sin ( 3 5 ^{\circ} )}

arctan (\frac{- 3.43}{1.1})

14 \cdot (cos (2 4^{\circ}))

- \frac{14 π}{3} sin (\frac{2 π ^{2.3} + 4 π}{3})

What is the value of cos((3pi)/2)cos(pi)-sin((3pi)/2)sin(pi) ?
The value of cos((3pi)/2)cos(pi)-sin((3pi)/2)sin(pi) is 0