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хр4ст2
@хр4ст2
August 2022
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довести тотожність
(sin a +cos a)^2 = 1+sin2a
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sangers1959
Verified answer
(sina+cosa)²=sin²a+2*sina*cos²a+cos²a=(sin²a+cos²a)+2*sina*cosa=1+sin2a.
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Answers & Comments
Verified answer
(sina+cosa)²=sin²a+2*sina*cos²a+cos²a=(sin²a+cos²a)+2*sina*cosa=1+sin2a.