Question

Post 1 question ben pic. According to gule
and specify ques ind
[
frac{cos A}{1+frac{sin A}{cos A}}-frac{sin A}{1+frac{cos A}{sin A}}
]
( =frac{cos ^{2} A}{cos A+sin A}-frac{sin ^{2} A}{sin A+cos A}=frac{operatorname{Cos}^{2} A-sin ^{2} A}{min A+C B A} )
( varepsilon )
[
text { is } A-sin A
]
Proved

# 67 In an acute angled triangle if Sin CA+B-C) EL and cos CB+(-A)- 1 2 V2 find, LA, LB and LC 1> prove that.- COSA - sina = cosa-SYON Ittana HOTA As I b Coso = a. then Prove that cosec of othta VB-a

Solution