Sin13*cos47+sin47*cos13/cos98*cos38+sin98*sin38(дробь) Срочно, пожалуйста. Created by feoktistovalex. algebra-ru

cos98*cos38+sin98*sin38(дробь) Срочно, пожалуйста...

feoktistovalex @feoktistovalex

September 2021 1 34 Report

Sin13*cos47+sin47*cos13/cos98*cos38+sin98*sin38(дробь)
Срочно, пожалуйста

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kirichekov

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$\frac{sin13^{0}*cos47^{0}+sin 47^{0}*cos13^{0} }{cos 98^{0}*cos 38^{0}+sin 98^{0}*sin 38^{0} } = \frac{sin(47^{0}+13^{0} )}{cos( 98^{0}- 38^{0} )} = \frac{sin 60^{0} }{cos 60^{0} } =tg 60^{0} = \sqrt{3}$

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