Question

If sec A = 15/7 and 0˚ < A < 90˚, find the value of cosec A

Answer 1

Answer:

sec A=15/7

cos A=1/sec A

cos A=7/15

sin A= square root of cos square A-1

= sqr root 225/49-1

=sqr root 225-49 /49

= sqr root 176/49 ==( sqr root of 176)/7

cosec a =1/sin a

=7/sqr root 176