AP EAMCET · Maths · Complex Number
If then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
∑n=120z2n-1=z+z3+z5+…+z39 Now, z=cos6°+isin6°=ei6° Substitute the value in the series, ∑n=120z2n-1=ei6°+ei18°+ei30°+…+ei39×6° =ei6°1+ei120+ei240+……+ei2280…
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