Q. 24.3( 319 Votes )
In Fig. 8.13, find tan P – cot R.
Answer :
Applying Pythagoras theorem for ΔPQR, we obtain
PR2 = PQ2 + QR2
(13)2 = (12)2 + QR2
169 cm2 = 144 cm2 + QR2
25 cm2 = QR2
QR = 5 cm
tan P = 
= 
cot R = 
= 
tan P - cot R = 
= 0
tan P - cot R = 0
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