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25 votes
25 votes
Express 21 = 10(cos(270°) + i sin(270)] in rectangular form.Express your answer in exact terms.mm

Express 21 = 10(cos(270°) + i sin(270)] in rectangular form.Express your answer in-example-1
User Niranjan Pb
by
3.4k points

1 Answer

19 votes
19 votes

we have the expression

z1=10[cos(270)+isin(270)

see the attached figure to better understand the problem

we have that

cos(270)=0

sin(270)=-1

so

substitute

z1=10[0+i(-1)]

Z1=10[0-i]

z1=0-10i

therefore

rectangular form (0,-10i)

Express 21 = 10(cos(270°) + i sin(270)] in rectangular form.Express your answer in-example-1
User Kerieks
by
3.5k points