ABC is an acute angled triangle with circumcenter O and orthocentre H. If AO=AH, then find the angle A.

Let ABC be an acute angled triangle whose orthocentre is at H. If altitude from A is produced to meet the circumcircle of triangle ABC at D , then prove H D=4RcosBcosC

Let ABC be an acute angled triangle whose orthocentre is at H. If altitude from A is produced to meet the circumcircle of triangle ABC at D , then prove H D=4RcosBcosC

Let ABC be an acute angled triangle whose orthocentre is at H. If altitude from A is produced to meet the circumcircle of triangle ABC at D , then prove H D=4RcosBcosC

Let ABC be an acute angled triangle whose orthocentre is at H. If altitude from A is produced to meet the circumcircle of triangle ABC at D, then prove HD=4R cos B cos C

In an acute-angled triangle ABC, tanA+tanB+tanC

In an acute-angled triangle ABC, tanA+tanB+tanC

If H is the orthocentre of the Delta ABC, then find AH.