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Materi : Trigonometri.ngitungnya satu-satu duluu ya...
→
tan(119°)
= tan(180° - 61°)
*kuadran II nilai tan (negatif)
= -tan 61°
= -q
→
tan(299°)
= tan(360° - 61°)
*kuadran IV nilai tan (negatif)
= -tan 61°
= -q
→
cot(241°)
= 1/tan(241°)
= 1/tan(180° + 241°)
= 1/tan61°
= 1/q
→
tan(151°)
= tan(90° + 61°)
= -cot(61°)
= -1/tan61°
= -1/q.
jadi. (b) adalah