三角函數(shù)公式應(yīng)用大全-文庫(kù)吧
2025-07-09 18:49 本頁(yè)面
【正文】 {(1+cosA)/2}tan(A/2) = √{(1cosA)/(1+cosA)} cot(A/2) = √{(1+cosA)/(1cosA)} ?tan(A/2) = (1cosA)/sinA=sinA/(1+cosA) 和差化積sin(a)+sin(b) = 2sin[(a+b)/2]cos[(ab)/2] sin(a)sin(b) = 2cos[(a+b)/2]sin[(ab)/2] cos(a)+cos(b) = 2cos[(a+b)/2]cos[(ab)/2] cos(a)cos(b) = 2sin[(a+b)/2]sin[(ab)/2] tanA+tanB=sin(A+B)/cosAcosB 積化和差sin(a)sin(b) = 1/2*[cos(a+b)cos(ab)] cos(a)cos(b) = 1/2*[cos(a+b)+cos(ab)] sin(a)cos(b) = 1/2*[sin(a+b)+sin(ab)]cos(a)sin(b) = 1/2*[sin(a+b)sin(ab)]誘導(dǎo)公式sin(a) = sin(a)cos(a) = cos(a)sin(π/2a) = cos(a)cos(π/2a) = sin(a)sin(π/2+a) = cos(a)cos(π/2+a) = sin(a)sin(πa) = sin(a)cos(πa) = cos(a)sin(π+a) =
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