Answers

2014-05-01T09:39:32+05:30
U look at the diagram
PQ=PR
QR=√2PQ=√2PR
so <QPR=π/2
and <PQR+<PRQ=π/2
as PQ=PR
<PQR=<PRQ=π/4
so
tan  \frac{P}{2}=tan 22.5=  \sqrt{2}-1, \\ cot Q=cot  \frac{ \pi }{2}=0
0
hey!<p=90 not 45..<p/2=45 not 22.5...
ohh
cot Q+tanP/2=tan 45+cot45=1+1=2
correction
its ok...
2014-05-01T14:42:52+05:30
If u draw a diagram with given data,u notice that
PQ=PR which means angle R=angle Q
QR=PQ^1/2=PR^1/2
but given angle P=90 deg
hence,angle Q=angle R=90/2=45 deg
therefore,
tan<P/2+cot<Q=tan 90/2+cot 45
                       =tan 45+cot 45
                       =1+1=2....
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