Question

if tanA =√2 -1 show that SinA*CosA=√2/4​

Answer 1

Step-by-step explanation:

tan A +1 = √2

sec A =√2

sec A = sec 45°

A= 45°

sin A × cos A

= sin 45° × cos 45°

=1/√2 ×1/√2

= 2/4

=1/2