− 5 π 4 ⋅ 1 = − 5 π 4 ⋅ 180 π = − 225 ∘ {\displaystyle {\frac {-5\pi }{4}}\cdot {1}={\frac {-5\pi }{4}}\cdot {\frac {180}{\pi }}=-225^{\circ }}
