50 poin...............
Kalau Kuadran I semuanya (+)
Kalau kuadran III yg (+) tanθ dan cotθ
Kalau kuadran IV yg (+) cosθ dan secθ
-----------------------------------------
Nah, kalau kuadran II
Hanya nilai sinθ dan cosecθ
yang (+) (yg nilainya positif)
[krn cosecθ = invers sinθ]
-----------------------------------------
sinθ = +
cosθ = -
tanθ = -
cosecθ = +
secθ = -
cotθ = -
-----------------------------------------
Misal θ = 45°
sin45° = +sin45° = ½√2
cos45° = -cos45° = -½√2
tan45° = -tan45° = -1
csc45° = 1/+sin45° = √2
sec45° = 1/-cos45° = -√2
cot45° = 1/-tan45° = -1
