sin 270° × cos 135° × tan 135° per sin 150° × cos 225°=..

sin 270° x cos 135° x tan 135°
_____________________
sin 150° x cos 225°
= -1 x -√2/2 x -1
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1/2 x -√2/2
= - √2/2
______
- √2/4
= -√2/2 x -4/√2
= 4/2
= 2