sin59°×sin76°-sin14°×cos59°. Created by kiril96. algebra-ru

sin59°×sin76°-sin14°×cos59°...

August 2021 1 15 Report

sin59°×sin76°-sin14°×cos59°

irina6158 Sin59*sin(90-14)-sin14*cjs59=sin59*cos14-sin14*cos59=это формула сложения=
=sin(59-14)=sin45=√2/2

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