Question

Помогите вычислить значения Pi
$-frac{pi}{4} +2pi$
$-frac{pi}{4} +4pi$
$-frac{pi}{4} +6pi$

Answer 1

$displaystyle -frac{pi}{4} +2pi= frac{-pi+8pi}{4} = frac{7pi}{4} \\ -frac{pi}{4} +4pi= frac{-pi +16pi}{4} = frac{15pi}{4} \\ -frac{pi}{4} +6pi = frac{-pi +24pi}{4}= frac{23pi}{4}$