Homework Help: pre-calc helpppp

Posted by John on Saturday, April 21, 2012 at 7:42pm.

Evaluate the expression under the given conditions (show steps please)

sin(è/2); tan è = − 5 / 12 , è in Quadrant IV

pre-calc helpppp - Damon, Saturday, April 21, 2012 at 7:59pm
5^2+12^2 = h^2
25+144 = h^2 = 169
so hypotenuse = h = 13
sin e = -5/13
cos e = 12/13

sin(e/2) = -sqrt( [1-cos e] /2 )
sin(e/2) = -sqrt (1/13/2) = -sqrt(1/26)
pre-calc helpppp - John, Saturday, April 21, 2012 at 8:42pm
Thank you!!!!

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