(sin4a-sin2a)/(con4a-cos2a)=-ctg3a доказать тождество. Created by dogson1. algebra-ru

(con4a-cos2a)=-ctg3a доказать тождество...

June 2022 1 12 Report

(sin4a-sin2a)/(con4a-cos2a)=-ctg3a доказать тождество

dasdasfa =2sin((4a-2a)/2)cos((4a+2a)/2) / (-2sin((4a+2a)/2) sin((4a-2a)/2)=- 2sina cos3a /2*
*sin3a sina)= - cos3a /sin3a=-ctg3a

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