Hi,

4(cos(pi/4) + isin(pi/4))= 

Thought this (cosx,sinx) summary may be useful in Your studies:

 

RELATED QUESTIONS

express in the form a+bi, where a and b are real numbers


8(cos(7pi/4) +... (answered by ewatrrr,solver91311)

express in the form a+bi, where a and b are real numbers.
7(cos pi+ i sin... (answered by Fombitz)

Express the complex number 12|cos(pi/3)+isin(pi/3)| in the form of a+bi without... (answered by jim_thompson5910)

Express (2+i)(4+i) in the form a+bi, where a and b are real numbers.
 (answered by ikleyn)

Simplify the following and give answers in the form a+bi.

(3 cos(pi/8) + 3i... (answered by Alan3354)

Can someone help me with this?

Simplify the product (4 + i) (6 + 7i).
Express the... (answered by jim_thompson5910)

Simplify each of the following by hand. Show your working and give the
answers in the... (answered by tommyt3rd)

Express the following in the form a + bi, where a and b are real numbers:... (answered by ikleyn)

Express 3+i/1+2i in the form a+bi where a and b are real numbers.... (answered by Nate)