Someone please help me!!

Radii ok and nl are perpendicular to om because of the radius-tangent theorem. by definition of perpendicular, angles kom and lnm are right angles. this means that triangles kom and lnm are right triangles. angle lmn is common to both right triangles, so by the triangles kom and lnm are similar.

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

If value of cos330° is √3/2 then find tan165°.