ABC is an equilateral triangle and AD is the altitude on BC. If coordinates of A are (1, 2) and D are (-2, 6), then what is the equation of BC?

A line makes angles α, β and γ with the positive directions of the coordinate…

Let →a, →b, (→a × →b) be unit vectors. What is (→a · →b) equal…

The position vectors of three points A, B and C are →a, →b and →c…

The position vectors of three points A, B and C are →a, →b and →c…

Consider the following statements in respect of a vector →d = (→a × →b) ×…