This may be received in the partial portion decomposition of cot ⁡ z displaystyle cot z e i x = cos ⁡ x + i sin ⁡ x e − i x = cos ⁡ x − i sin ⁡ x . displaystyle commence aligned e^ ix &=cos x+isin x\[5pt]e^ https://tanning55310.free-blogz.com/77275686/tan-an-overview