Question

(2) (seco + tano) (1 - sino) = cos​

Answer 1

Step-by-step explanation:

post full question please

Answer 2

Step-by-step explanation:

(sec∅+tan∅)(1-sin∅)

(1/cos∅+sin∅/cos∅)(1-sin∅)

(1+sin∅)(1-sin∅)/cos∅

1-sin²∅/cos∅

cos²∅/cos∅

cos∅

hence proved