Question

tan A/1+tan²A=root2/4 if tan A = root2-1

Answer 1

√2-1\1+(√2-1)*2
=√2-1\1+2+1-2√2
=√2-1\4+2√2
=√2-1\2√2(√2-1)
=1\2√2
=1×2√2\2√2×2√2
=2√2\8
=√2\4