Question

prove the following identities ,where the angles involved are acute angles which the expressions are defined 1+sec A/sec A=sin2A/1-cos A(hint:simplify LHS and RHS separately)​

Answer 1

Q1. (+4)(x+10)

[ (x+a)(x+b)=x2 +(a+b)x+ab]

x=x,a=4,b=10

(x+4)(x+10=x2+(4+10)x+4×10

x2+14 x+40 (Ans)