Question

If a vector p makes angles alpha, ß and gama respectively with x, y and z axes respectively then
sin^2alpha + sin^2bita +sin^2 gama is equal to

a) zero
b) 1
d) 3
c)2​

Answer 1

(C)

Explanation:

cos2α+cos2β+cos2γ=1

1−sin2α+1−sin2β+1−sin2γ=1

∴sin2α+sin2β+sin2γ=2