SMO 2015 Senior Round 1 Question 5
SMO · SMO 2015 Senior Round 1
Which of the following is true?
$\cos221^\circ\gt \sin319^\circ$
$\cos139^\circ\gt \sin221^\circ$
$\sin139^\circ\gt \cos41^\circ$
$\sin221^\circ\gt \cos139^\circ$
$\sin41^\circ\gt \cos319^\circ$