question_answer

In a \[\Delta \,PQR,\] right angled at Q, if \[PR-QR=6\,cm\] and \[PQ=12\,cm,\] then which one among the following is true?

A)  \[\text{cosec}\,R=\cot p+\sin \,30{}^\circ \]

B)  \[\cos \,60{}^\circ =\text{cosec}\,R+\tan p\]

C)  \[\sec \,\,(90{}^\circ -R)=\cot \,R+\cos \,60{}^\circ \]

D)  All the above

E)  None of these