Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd word from the given alternatives.

Two men are on opposite sides of a tower. They measure the angles of elevation of the top of the tower as 30 ̊ and 45 ̊ respectively. If the height of the tower is 50 m, the distance between the two men is (Take √3 = 1.73)

If Cot θ = 21/20, then what is the value of Cosec θ?

Reciprocal of 235?

Δ DEF is right angled at E. If m∠D = 45%., then Cosec F =

If x = cosecθ - sinθ and y = secθ - cosθ, then the relation between x and y is

Let ΔABC and ΔABD be on the same base AB and between the same parallels AB and CD. Then the relation between areas of triangles ABC and ABD will be

Select the odd word/letters/number/number pair from the given alternatives.