simple trig
posted by jen .
If sin(theta)=[sqrt(70)]/7 and theta is in Quadrant two, find the exact numerical value of tan theta without using a calculator.
I got tan(theta)=[sqrt(294)]/42
Is that right?
if sin(theta)=a where 0<a<1, and theta is in quadrant 3, find the exact algebraic expressionm for cos(theta)

You said
sin(theta)=[sqrt(70)]/7
that would make
sin(theta) > 1 which is not possible
check your typing