Question

if cos α + cos β + cos γ =0 and sin α+ sin β + sin γ =0 prove that cos3α+ cos 3β + cos3γ = 3cos(α+β+γ)

Answer 1

1. what are the program interrupts ? explain their significance ( in 50 words )

2. what is cache memory ? how it is fast as compare to conventional memory ? ( in 150 words ).