Asked by anthony
True or False: sin(-85)=-sin(85)
I need to show my work, how do I do so?
I need to show my work, how do I do so?
Answers
Answered by
drwls
sin -85 = sin (5 - 90)
= sin5 cos90 - cos5 sin90
= -cos5 = -sin85
= sin5 cos90 - cos5 sin90
= -cos5 = -sin85
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