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Easy

Question

If point O is the centre of a circle circumscribed about a triangle ABC. Then Error converting from MathML to accessible text.

  1. left parenthesis stack O A with bar on top plus stack O B with bar on top plus stack O C with bar on top right parenthesis s i n invisible function application 2 A    
  2. left parenthesis stack O A with bar on top plus stack O B with bar on top plus stack O C with bar on top right parenthesis c o s invisible function application 2 A    
  3. stack 0 with bar on top    
  4. left parenthesis stack O A with bar on top plus stack O B with bar on top plus stack O C with bar on top right parenthesis t a n invisible function application 2 A    

The correct answer is: stack 0 with bar on top

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