Question

given sec A=29/21,evaluate:sinA-1/tanA

Answer 1

secA =29/21 = k/A

sinA= 20/29

cosA= 21/29

tanA =sinA/cosA = 20/21
then
20/29 - 1/20/21

20/29 - 21/20

400-609/29×20

-209/580 ans..

i hope this will help u

Answer 2

heya answer is here......