化简sin a+cos a
化简sin a+cos a
化简:sin(a+180)cos(-a)sin(-a-180)
化简Sin A + Sin 2A / 1+cos A +
化简:sin(-a)cos(2π+a)sin(-a-π)
化简sin^2a-cos^2a
1-sin^6a-cos^6a分之1-sin^4a-cos^4a 化简
化简sin(π+a)cos(-a)+sin(2π-a)cos(π-a)
化简1-sin^4a-cos^4a/1-sin^6a-cos^6a
化简cos^2(a+15)+sin^2(a-15))+sin(a+180)cos(a-180)
化简[cos(a-π)/sin(π-a)]sin(a-π/2)cos(π/2+a)=
化简~cos^2(a+15)+sin^2(a-15)+sin(a+180)cos(a-180)
cos(a+b)+cos(a-b)/sin(a+b)+sin(a-b)化简