SOLUTION: If {{{sin A=4/5}}} and A is in the first quadrant, find {{{cos(A/2)}}} and {{{tan(A/2)}}}

SOLUTION: If {{{sin A=4/5}}} and A is in the first quadrant, find {{{cos(A/2)}}} and {{{tan(A/2)}}}

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Question 882824: If and A is in the first quadrant, find and
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
If and A is in the first quadrant, find and
sinA=4/5
cosA=3/5
..
cos(A/2)=
sin(A/2)=
tan(A/2)=sin(A/2)/cos(A/2)=√(1/4)=1/2
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