If `O` is the circumcentre of ` A B C ,` then find the value of `/_O B C+\ /_B A C`

If O is the circumcentre of /_\ A B C and O D_|_B C , prove that /_B O D=/_A

If O is the circumcentre of a A B C and O D_|_B C , prove that /_B O D=/_adot

If O is the circumcentre of a A B C and O D_|_B C , prove that /_B O D=/_Adot

If O is the circumcentre of a A B C and O D_|_B C , prove that /_B O D=/_Adot

In o+ABC, if cot A+cot B+cot C=0 then find the value of cos A cos B cos C

tan(/_B A O)=3, then find the ratio B C : C Adot

If O\ a n d\ O^(prime) are circumcentre and orthocentre of \ A B C ,\ t h e n\ vec O A+ vec O B+ vec O C equals a. 2 vec O O ' b. vec O O ' c. vec O ' O d. 2 vec O ' O

If O\ a n d\ O^(prime) are circumcentre and orthocentre of \ A B C ,\ t h e n\ vec O A+ vec O B+ vec O C equals a. 2 vec O O ' b. vec O O ' c. vec O ' O d. 2 vec O ' O

In Figure, O is the centre of the circle. Find /_B A C