2sin(π-3)cos(π-3)怎么化简

2sin(π-3)cos(π-3)怎么化简 sin cos之间怎么转换?sin(π/3-2X）等于cos多少? 怎么化简sin（2π+a)cos(π-a)cos(π/2-a）cos(7π/2-a)/cos(π-a)sin(3π-a)sin(-π+a)sin(5π/2+π） （sinθcosπ/3）-（cosθsinπ/3）怎么化简得sin(θ-π/3) 2cos(2x+π/3)怎么变成sin 函数fx=cos(2x-π/3)+2sin(x-π/4)sin(x+π/4)怎么化简? 怎样化简函数 cosπ/4cosπ/3-sinπ/4sinπ/3cosπ/4cosπ/3-sinπ/4sinπ/3 怎么化简cos(2x-π/3)-sin(2x-π/3), sin²π/3-cos²π/4怎么算 利用和差角公式化简 (2)sin(π/3+α)+sin(π/3-α)(2)sin(π/3+α)+sin(π/3-α)(3)cos(π/4+α)-cos(π/4-α)(4)cos(60°+α)+cos(60°-α)(5)sin(α-β)cosβ+cos(α-β)sinβ(6)cos(α+β)cosβ+sin(α+β)sinβ cot(π+θ)=2,则(3sinθ-cosθ)/(sinθ+cosθ)=? 化简:sin(2π-α)cos(π+α)cos(11π/2-α)/cos(π-α)sin(3π-α)sin(-π-α)sin(9π/2+α) 由cos(a+b)=cos a cos b-sin a sin b cos(a-b)=cos a cos b+sin a sin b解题设a为锐角,证：1、2分之根3乘cos a + 2分之1乘sin a=cos(6分之π-a)2、cos a-sin a=根号2cos(4分之π+a) 化简sin(-π/2-α)sin(πα)cos(-α-π)/cos(π-α)sin(3π α) 化简 sin(2π-a)sin(π+a)cos-π-a) / sin(3π-a)cos(π-a) 求值【sin(2π-α)sin(π+α)cos(-π-α)】/【sin(3π-α)-cos(π-α)】 (1+sinα+cosα)*[sin(α/2)-cos(α/2)]/√(2+2cosα)化简 （3/2*π 三角函数化简[2cos^3θ+sin^2(π-θ)+sin(π/2+θ)-3]/[2+2cos^2(π+θ)+cos(-θ)]