Question

If secA = x+1 x. Prove that secA tanA=2x or 1 2x​

Answer 1

secA=(4x2+1)/4x we know that secA=H/B then H=4X2+1 AND B=4X THEN P2=(4x2+1)2 -(4x)2 =16x4+1+8x2-16x2 =16x4+1-8x2 =(4x2-1)2 P=4x2-1 secA+tanA=H/B+P/B so, ( 4x2+1)4x+(4x2-1)/4x 8x2/4x=2x