Question

Mohon dibantu kak, beserta cara

Answer 1

1. 1 + tan^2 x = sec^2 x
1 + sin^2 x/cos^2 x = sec^2 x
(cos^2 x + sin^2 x)/cos^2 x = sec^2 x
1/cos^2 x = sec^2 x
sec^2 x = sec^2 x (terbukti)

2. 1 + cot^2 x = sec^2 x
1 + cos^2 x/sin^2 x = sec^2 x
(sin^2 x + cos^2 x)/sin^2 x = sec^2 x
1/sin^2 x = sec^2 x
cosec^2 x ≠ sec^2 x (tidak terbukti)