sec pangkat 2 B . cot B/ cosec pangkat 2 B = tan B pliss toling

sec²b . cot b / cosec²b
= (1/cos²b) . (cos b/sin b) / cosec²b
= {1 / (cos b . sin b)} / (1 / sin²b)
= {1 / (cos b . sin b)} × (sin²b/1)
= {1 / cos b) × sin b
= sin b / cos b
= tan b