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