# A. Simplify z^3 if z= 2cis(π/12) B. Using 1+i√3/1+i, find the exact value of cos(π/12) Could you please show working out as well?

• A. Simplify z^3 if z= 2cis(π/12) B. Using 1+i√3/1+i, find the exact value of cos(π/12) Could you please show working out as well?

... Partial Differential Equations - An Introduction ... (b) Find the general ... We frst show that the problem ( 1),(2) is well-posed in the sense of ...
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