Page 25 - modul trigonometri_Neat

sin (180° + ) = -sin
cos (180° + ) = -cos
tan (180° + ) = tan
csc (180° + ) = -csc
sec (180° + ) = -sec
cot (180° + ) = cot
e. Angular relationship with angle ( ° − )
Note ∆ and ∆ ′ ′ in the picture on the side to determine
angular trigonometry comparison and

(270° − ). P(p,q)

Relationship of angle to angle: (270° − 270° − r

)
O Q
without -cos (270° −

) = r
cos -sin (270° − ) =
so cot (270° − ) =
csc -sec (270° − ) = P’’(-q,-p) Q’
sec -csc (270° − ) =
cot tan (270° − ) =

f. Angular relationship with angle ( ° + )
Note ∆ and ∆ ′ ′ in the image on the side to determine the

ratio of angular trigonometry and (270° + ).
P(p,q)
Relationship of angle to angle: (270° + )
r
270° +
without -cos (270° +

) =
O Q’ Q
cos without (270° +
) =
r
tan -cot (270° + ) =
csc -sec (270° + ) =
sec csc (270° + ) =
P’(q,-p)
cot -tan (270° + ) =
g. Angular relationship with angle ( ° − )
Pay attention and on the image on the side to determine the ratio of
angle and.∆ ∆ ′ ′ (360° − )

Relationship of angle to angle: (360° − )

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