I need help with these problems.... 1. Is cosX=1/4 and 0<x<90, find cscx 2. If cotx=square root of -6/3, and 90<x<180, find tan 3.Simplify tanx/sinx 4.simplify cotxtanx+sinxsecx
Last edited by mr fantastic; April 25th 2009 at 06:23 AM. Reason: Distributed remaining questions to new threads
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Originally Posted by angelica2619 I need help with these problems.... 1. Is cosX=1/4 and 0<x<90, find cscx [snip] 1. Remember the Pythagorean Identity... And since . Originally Posted by angelica2619 [snip] 2. If cotx=square root of -6/3, and 90<x<180, find tan [snip] 2. You can't have the square root of a negative number.
Last edited by mr fantastic; April 25th 2009 at 06:25 AM.
Originally Posted by angelica2619 [snip] 3.Simplify tanx/sinx [snip] 3. Remember that . So .
Originally Posted by angelica2619 [snip] 4.simplify cotxtanx+sinxsecx [snip] 4. Remember that and . So and . Therefore .
Last edited by mr fantastic; April 25th 2009 at 06:26 AM.
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