book Maths Puzzle Numerical Ability

cosq</font> = 5/12 and tanq</font> is negative, find the exact value for cscq</font>.</PRE>

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book Other Question

Why is it sufficient to define a quadratic function, f(x)=ax^2+bx=c in terms of a, b, and c? I need help to find the midpoint of the line segment pq p(3,5) q(4,5)

Thanks for your help :)