SOLUTION: find sin(tan^-1(2/3) and find given that sin a=-8/17, and a is in QIV, find sin(a/2) and cos(a/2), thanks I need help in this area a=angle.

SOLUTION: find sin(tan^-1(2/3) and find given that sin a=-8/17, and a is in QIV, find sin(a/2) and cos(a/2), thanks I need help in this area a=angle.

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Question 111921: find sin(tan^-1(2/3) and find given that sin a=-8/17, and a is in QIV, find sin(a/2) and cos(a/2), thanks I need help in this area a=angle.
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
tan^-1(2/3=33.69...
sin(33.69)=.5547...
.
sin^-1(-8/17)=-28.07...
sin(-28.07.../2)=-.242536...
cos(-28.07.../2=.970143...
.
Ed
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