SOLUTION: Using the CAST rule, state the sign of each of the following:
sin 220°
cos 320°
tan 112°
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Question 1173743: Using the CAST rule, state the sign of each of the following:
sin 220°
cos 320°
tan 112°
Found 2 solutions by greenestamps, ikleyn:
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!
Again the CAST rule is not familiar to me....
sin 220°: quadrant III; sine is negative
cos 320°: quadrant IV; cosine is positive
tan 112°: quadrant II: tangent is negative
Answer by ikleyn(52794) (Show Source): You can put this solution on YOUR website!
.
About the CAST rule, see this web-site
http://mathonline.wikidot.com/cast-rule
and find there nice explanations to everything you need.
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