1.

& tans = 13 23 मर < N< Os¢.¢."(_c - See. 8सर e

Answer»

cosec= 1/sinsec= 1/cosso 1/sin^2-1/cos^2

= cos^2-sin^2/cos^2sin^2

now tan = P/B= 13/1H= √(13^2+1^2)√170now sin= P/H= 13/√170cos= B/H= 1/√1701/170-13/170/(13/170)-12/170/13/170

= -12/13



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