# pre-calc helpppp

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

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

• pre-calc helpppp -

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 -

Thank you!!!!

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