Question

if cosec A =13/12, then fid the value of 2 sinA -3 cosA /4 sinA-9 cosA

Answer 1

cosecA=13/12; sinA=12/13(p/h)

So, b² = 13²-12²=> 5=b
Now,
2sinA-3cosA/4sinA-9cosA
= (2x12/13-3x5/13)/(4x12/13-9x5/13)
= (9/13)/(3/13)
= 3.

Answer 2

Your answer is in the attachment.

Hope it helps!