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
Correct Answer: C
Solution :
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