Homework Help Forum: trig

Posted by rica on Wednesday, November 4, 2009 at 9:48pm.

find sin s when cot s= -1/3, s in quadrant 4

• trig - Reiny, Wednesday, November 4, 2009 at 9:59pm

  If cot s= -1/3 then tan s = -3/1 construct a triangle, by Pythagoras, the hypotenuse is √10 , and in the 4th quad, the sine is negative, so sin s = -3/√10

  
  

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