Question 813888
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Hi, Perhaps it is the format
Re Reply: Generally, leaving a radical in the denominator is unacceptable
 as the correct answer, as rational denominators are wanted.
 cos&#952;  = {{{u/3}}}   sec&#952;  = {{{3/u}}} 
 sin&#952;  = {{{sqrt(9-u^2)/3}}}  csc&#952;  = {{{3/sqrt(9-u^2) = 3sqrt(9-u^2)/(9-u^2)}}}
 tan&#952;  = {{{sqrt(9-u^2)/u}}}    cot&#952;  = {{{ u/sqrt(9-u^2)= (u*sqrt(9-u^2))/(9-u^2) }}}