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AsyaL
@AsyaL
July 2022
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sin 405+cos 225 tg 225 решить(подробно, с ответом)
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Лотарингская
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Sin405+cos225*tg225=sin405+cos225*sin225/cos225=sin405+sin225
=sin(2пи+пи/4)+sin((3пи/2) - пи/4)=sin(пи/4)-cos(пи/4)= sqrt(2)/2-sqrt(2)/2=0
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Sin405+cos225*tg225=sin405+cos225*sin225/cos225=sin405+sin225=sin(2пи+пи/4)+sin((3пи/2) - пи/4)=sin(пи/4)-cos(пи/4)= sqrt(2)/2-sqrt(2)/2=0