化简sin(α+180°)cos(-α)sin(-α-180°)
Cos(180°+α)*sin(α+360°)/sin(-α-180°)*cos(-180°-α)
化简sin(α+180°)cos(-α)sin(-α-180°)
化简cos(540°-α)sin(α-360°)/sin(-α+180°)cos(180°+α)
.[1/cos(-α)+cos(180°+ α )]/[1/sin(540°-α)+sin(360°-α)]=tan^3
化简cos(90°-α)/sin(270°-α)*sin(360°-α)*sin(180°-α)
①sin(α+180°)cos(-α)sin(-α-180°)和②sin³(-α)cos(2π+α)tan(-
sinα + cosα
化简:cos²(α+15°)+sin²(α-75°)+sin(α+180)*cos(α-180)
化简cos^2(-α)-[tan(360°+α)/sin(-α)]
化简,cos²(-α)-tan(360°+α)/sin(-α)
化简:tanα*(cosα-sinα)+[sinα(sinα+tanα)/1+cosα]
化简:tanα(cosα-sinα)+sinα(sinα+tanα)/1+cosα.