Precalculus: sin14π/15 cos11π/60 -cos14π/15 sin11π/60=

[zolton5971]

Need some help with this problem.

Use a sum or difference formula to find the exact value of the following.

sin14π/15 cos11π/60 -cos14π/15 sin11π/60=

Thanks

 

[Ishuda]

Need some help with this problem.

Use a sum or difference formula to find the exact value of the following.

sin14π/15 cos11π/60 -cos14π/15 sin11π/60=

Thanks

Do you know the formula for the sine of the difference of two angles? In case you don't it is
\(\displaystyle sin(\theta_1 - \theta_2) = sin(\theta_1) cos(\theta_2) - cos(\theta_1) sin(\theta_2)\)

 

[zolton5971]

Thanks!