$\int _a^b\:\left|\cos x\right|dx\:,\:\int _a^b\:\left|\sin x\right|dx\:,\:\int _a^b\:\left|\tan x\right|dx$

Question

I understand how to find the area in equations with quadratics and linear, but how would I approach with trig in terms of splitting the integrals?

for example $\int _0^{2\pi }\:\left|\left(\sin x\right)\right|dx$