Rumus perbandingan trigonometri untuk sudut-sudut disemua kuadran

Sin ( 90 + A ) = Cos A
Cos ( 90 + A ) = - Sin A
Tan ( 90 + A ) = - Cos A

Tan ( 180 + A ) = - Sin A Sin ( 180 – A ) = Sin A
Sin ( 180 + A ) = - Cos A Cos ( 180 – A ) = - Cos A
Cos ( 180 + A ) = Tan A Tan ( 180 – A ) = -Tan A

Sin ( 270 – A ) = - Cos A Sin (270 + A) = - Cos A
Cos ( 270 – A ) = -Sin A Cos ( 270 + A ) = Sin A
Tan ( 270 – A ) = Cot A Tan ( 270 + A ) = - Cot A