SOLUTION: express as the cofunction of a positive acute angle. ctn 250° ; sec - 160° ; sin 340° ; tan - 235° .

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Question 378187: express as the cofunction of a positive acute angle. ctn 250° ; sec - 160° ; sin 340° ; tan - 235° .
Answer by Alan3354(69443) About Me  (Show Source):
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express as the cofunction of a positive acute angle.
ctn 250°
= cot(70º) (most people and computer programs use cot for cotangent)
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sec - 160° Is it -160 ?
= sec(160)
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sin 340°
= sin(-20)
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tan - 235°
= tan(-55)