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demon1589
@demon1589
July 2022
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упростите tga-ctga/tga+ctga
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nik12101
Tga-ctga=sina/cosa-cosa/sina= (sin²a-cos²a) / cosasina=-2cosa/sin2a
tga+ctga=sina/cosa+cosa/sina=2sin2a
-2cosa/sin2a:2/sin2a=-2cos2a
3 votes
Thanks 5
demon1589
Большое вам спасибо!
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Answers & Comments
tga+ctga=sina/cosa+cosa/sina=2sin2a
-2cosa/sin2a:2/sin2a=-2cos2a