Solve these two problems please
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let a1=2 , a2 =3 and a3 = -7
b1=(m-1) , b2= (m+1) and b3 = -(3m-1)
LHS=SinA/1-cosA
=sinA(1+cosA)/1-cos²
= sinA+sinA.cosA/sin²A
= sinA/sin²A + sinA.cosA/sin²A
=1/sinA + cosA/sinA
= cosecA + cotA