Вычислите (cos105cos5+sin105sin5)/(cos18cos62-sin62cos72). Created by Columbus. algebra-ru

(cos18cos62-sin62cos72)...

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September 2021 1 18 Report

Вычислите (cos105cos5+sin105sin5)/(cos18cos62-sin62cos72)

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oganesbagoyan

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Вычислите (cos105°cos5°-sin105°sin5°) /(cos18°cos62°-sin62°cos72°). (cos105°cos5°-sin105°sin5°) /(cos18°cos62°-sin62°cos72°) =cos(105°-5°)/(cos(90° -72°)cos62°-sin62°cos72°) =cos100°/(sin72°cos62°-sin62°cos72°)= cos100°/sin(72°-62°) =cos(90°+10°)/sin10° =-sin10°/sin10° = -1.

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