化简/π-5/+/4-π/+/-π+3.1/
化简/π-5/+/4-π/+/-π+3.1/
sin(-11/6π)+cos12/5π×tan4π化简
化简sin(3π-x)cos(x-3/2)cos(4π-x)/tan(x-5π)cos(π/2+x)sin(x-5/2π
化简sin(θ-5π)•cot(π2-θ)•cos(8π-θ)tan(3π-θ)•tan(θ-32π)•sin(-θ-4
化简cos(α-π)cot(5π-α)/tan(2π-α)sin(-2π-α)
化简sin(-11π/3)+cos(12π/5)tan2π-sec13π/5cot(-5π/2)
化简cos2(π/4-α)-sin2(π/4-α)
化简sin(π/4-α)+cos(π/4+α)
sin(π/4-a) cos(a-π/4)化简
化简sin(θ-π/4)+cos(θ+π/4)
5π/4
化简cos(π/12)*cos(5π/12)