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Emil08N
@Emil08N
October 2021
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Упростите: (a-1,5П)*cos(2П-a)-sin(П-a)*sin(П+a)
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hovsep50
Sin(a- 3π/2)·cos(2π - a) - sin(π - a)·sin(π+a) = -sin(3π/2-a) ·cosa -
-sina·(-sina) = - (-cosa)·cosa + sin²a = cos²a+sin²a = 1
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Answers & Comments
-sina·(-sina) = - (-cosa)·cosa + sin²a = cos²a+sin²a = 1