Answers

2014-06-21T05:51:05+05:30
CosФ =3/5=b/h so p=4 by using pythagorous theorem 
so
5cosecФ- 4(tanФ/secФ cotФ)=5×5/4  -  4(4/3)/(5/3×3/4)
=25/4 -16/3
=11/12
0