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evgen110776
@evgen110776
July 2022
2
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СРОЧНО НУЖНА ПОМОЩЬ
Упростить выражения:
а) cos²(2π-t)+cos²(3π/2+t)
б) (cos(π/2+t)ctg(-t))/sin(π/2-t)
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sedinalana
Verified answer
A)cos²t+sin²t=1
2)-sint*(-ctgt)/cost=sina*cosa/sina *1/cosa=1
1 votes
Thanks 2
Sophie155
переменная t, а не a во 2)
Sophie155
A)
б)
8 votes
Thanks 6
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Answers & Comments
Verified answer
A)cos²t+sin²t=12)-sint*(-ctgt)/cost=sina*cosa/sina *1/cosa=1
б)