Ответ:
Пошаговое объяснение:
1+sinb-cosb=1-cosb+sinb=2sin^2b/2 +2sinb/2cosb/2=2sinb/2(sinb/2+cosb/2)
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Ответ:
Пошаговое объяснение:
1+sinb-cosb=1-cosb+sinb=2sin^2b/2 +2sinb/2cosb/2=2sinb/2(sinb/2+cosb/2)