Question

If a vector p makes angles a,Band y respectively with x, y and z axes respectively then
sin’ a +sinß+sin? y is equal to
A) zero
B) 1
C) 2
D) 3
please give explanation for this question ​

Answer 1

Answer:

cos  

2

α+cos  

2

β+cos  

2

γ=1

1−sin  

2

α+1−sin  

2

β+1−sin  

2

γ=1

∴sin  

2

α+sin  

2

β+sin  

2

γ=2

Ans:C

Explanation: