(Secan B -cosecan B)(sin B + cos B)=

Bab Trigonometri
Matematika SMA Kelas X

(sec B - cosec B) (sin B + cos B)
= sec B . sin B + sec B . cos B - cosec B sin B - cosec B cos B
= 1/cos B x sin B + 1 - 1 - 1/sin B x cosB
= tan B - cot B