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    express tan 215° as the tangent ratio of an acute angle
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    (Original post by fionachristie)
    express tan 215° as the tangent ratio of an acute angle
    Tried anything?
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    remember that the tan function repeats every 180 degrees.
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    it’s a one marker. i haven’t been in for a week and my teacher asked me to do these questions but i don’t understand how
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    (Original post by fionachristie)
    it’s a one marker. i haven’t been in for a week and my teacher asked me to do these questions but i don’t understand how
    As that bear french pepe dude said, tan repeats every 180 degrees. So \tan(x)=\tan(x+180). Equivalently, \tan(x)=\tan(x-180) which is the one you want to use.
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    Hint: The values of tan(angle) from 0 - 90 repeats themselves every 180 degrees. This means the value of tan30 is the same as the value for tan210.
 
 
 
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