Euler's Formula Visualization Explained | Complex Numbers, Sine, Cosine & Unit Circle Mathematics #m

If 𝐚 𝐛 , 𝐜 𝐚𝐧𝐝 𝐝 are four non-zero vectors such that 𝐚 ×𝐛 =𝐜 ×𝐝 and 𝐚 ×𝐜 =𝟒𝐛 ×𝐝

Q) The unit vector perpendicular to the vectors 𝑖 ˆ−𝑗 ˆ and 𝑖 ˆ+𝑗 ˆ is