化簡sin(-11π/3)+cos(12π/5)tan2π-sec13π/5cot(-5π/2)

化簡sin(-11π/3)+cos(12π/5)tan2π-sec13π/5cot(-5π/2)

tan2π=0 cot(-5π/2)=0
sin(-11π/3)+cos(12π/5)tan2π-sec13π/5cot(-5π/2)
=sin(-11π/3)
=sin(-4π+π/3)
=sinπ/3
=√3/2