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Question
i cannt solve this calculus problem
√5cis(1.4)
Hello Peter,
By "solve" I gather you mean expand, simplify, or re-write in a+bi form, yes??
If so, then
√5cis(1.4)=√5[cos(1.4)+i*sin(1.4)]
= √5[0.170 + i*0.985]
= 0.38 + 2.20i
OK?
BTW: That is not a calculus problem...
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Answers by Expert:
Abe Mantell
Expertise
Hello, I am a college professor of mathematics and regularly teach all levels from elementary mathematics through differential equations, and would be happy to assist anyone with such questions!
Experience
Over 15 years teaching at the college level.
Organizations
NCTM, NYSMATYC, AMATYC, MAA, NYSUT, AFT.
Education/Credentials
B.S. in Mathematics from Rensselaer Polytechnic Institute
M.S. (and A.B.D.) in Applied Mathematics from SUNY @ Stony Brook
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