cosec θ - 1
cosec θ + 1
cosec θ
sec θ + 1
(1 + cot A - cosec A) (1 + tan A + sec A) =
3
2
4
5
1
0
cot A
cosec A
cosec A - cot A
cosec A + cot A
sec A
sin A cos A
sin A
Evaluate: sin42º sin 48° - cos42° cos48°.
1/4
1/3
Evaluate: 3cos 80° cosec 10°+ 2cos 59° cosec 31°.
