The coefficient of friction $\mu $ and the angle of friction $\lambda $ are related as
The coefficient of friction $\mu $ and the angle of friction $\lambda $ are related as
$\sin \lambda = \mu $
$\cos \lambda = \mu $
$\tan \lambda = \mu $
$\tan \mu = \lambda $
The coefficient of friction $\mu $ and the angle of friction $\lambda $ are related as
Angle of friction is the angle mad between resultant force applied by ground on body with vertical therefore
$\tan \lambda=\frac{f}{N}$
$\tan \lambda=\mu$
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