Третий номер с решением. Created by neka31rus. algebra-ru

Третий номер с решением...

neka31rus @neka31rus

November 2021 1 14 Report

Третий номер с решением

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TARTILLO

Verified answer

A) sin(a)=√(1-cos²(a) = √(1-(-0,6)²)=0,8

b) sin(2a)=2cos(a)sin(a) = 2(-0,6)=0,8=-0,96

c) cos(2a)=cos²(a)-sin²(a) = (-0,6)²-(0,8)²= 0,36-0,64= - 0,18

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