Answer:
- [tex]\sqrt{2}[/tex]
Step-by-step explanation:
cos90° - 2sin45° + 2tan180°
= 0 - ( 2 × [tex]\frac{\sqrt{2} }{2}[/tex] ) + 2(0)
= 0 - [tex]\sqrt{2}[/tex] + 0
= - [tex]\sqrt{2}[/tex]
