Question

9. The value of expression (2 sin²∅ + 4 cos²∅-4sin∅ cos∅)
at is ∅=90° is​

Answer 1

€ = 90 then,

sin 90= 1,

cos 90=0,

so by putting values ,

=2+0-4×0

=2-4

=-2

like please!!!

Answer 2

Step-by-step explanation: