MBA Exam

Trigonometry : The angle of elevation of a cloud from a height h above the level of water in a lake is @ and the angle of its depression of he height of the cloud above the image in the lake is B.Find the angle of depression of its image in the lake is B.Find the cloud above surface of the lake.

1) hsin(b-a)/sin(a+b)
2) hsina
3) hsin(a+b)/sin(b-a)
4) none of these

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MBA Other Question
If 1/a , 1/b and 1/c are in Arithmetic Progression, then which of the following is also true?

1) (b + c)/a, (c + a)/b and (a + b)/c are also in arithmetic progression for all values of a, b and c.
2) (b + c – a)/a, (c + a – b)/b and (a + b – c)/c are also in arithmetic progression when a + b + c is not 0.
3) (b + c)/a, (c + a)/b and (a + b)/c are in geometric progression for all values of a, b and c.
4) Both (1) and (2).
 x+7z-20 = 10-2y+zno.of solutions =?? Ans is supposed to be 26.can somebody please explain?