Question

Select the correct option from the given alternatives:

If cos α, cos β, cos γ are the direction cosines of a line, then the value of sin²α + sin²β + sin²γ  is ______ 

Options

• 1

• 2

• 3

• 4

Answer 1

If cos α, cos β, cos γ are the direction cosines of a line, then the value of sin²α + sin²β + sin²γ  is 2.