let give α ∈]−π ,π[ 1)prove that sin^2 α −2(1+cosα) =−4cos^4 ((α/2)) 2)solve inside C z^2 −2z sinα +2(1+cosα)=0 find the module and arg of the roots.


Question and Answers Forum

All Questions Topic List
Algebra Questions
Previous in All Question Next in All Question
Previous in Algebra Next in Algebra
Question Number 31038 by abdo imad last updated on 02/Mar/18

$l e t g i v e α \in] - π, π [$ $1) p r o v e t h a t {s i n}^{2} α - 2 (1 + c o s α) = - 4 {c o s}^{4} (\frac{α}{2})$ $2) s o l v e i n s i d e C z^{2} - 2 z s i n α + 2 (1 + c o s α) = 0 f i n d$ $t h e m o d u l e a n d a r g o f t h e r o o t s .$
Terms of Service
Privacy Policy
Contact: info@tinkutara.com

Question and Answers Forum