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Question Number 135176 by SLVR last updated on 11/Mar/21

T h e c h o r d o f c o n t a c t o f t a n g e n t s f r o m P

t o a c i c l e p a s s t h r o u g h Q . I f l e n g t h s o f t a n g e n t s f r o m P, Q

a r e l_{1}, l_{2} t h e n P Q i s \sqrt{l_{1}^{2} + l_{2}^{2}} h o w \dots k i n d l y t e l l