найдите значение выражения 4sina - 3 cosa/5 sina , если tga = 2. Created by shegaj825. algebra-ru

5 sina , если tga = 2...

shegaj825 @shegaj825

July 2022 1 12 Report

найдите значение выражения 4sina - 3 cosa/5 sina , если tga = 2

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$\frac{4Sin\alpha-3Cos\alpha}{5Sin\alpha }=\frac{4Sin\alpha }{5Sin\alpha }-\frac{3Cos\alpha }{5Sin\alpha } =0,8-0,6Ctg\alpha=0,8-\frac{0,6}{tg\alpha } =0,8-\frac{0,6}{2}=0,8-0,3=0,5$

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