MBA Exam

ABC is right angle triangle where angle ABC is 90 degree.If AC=2_/5 and AB-AC=2 than find (COS A)^2 - (COS C)^2

1) 1/2
2) 3/5
3) 3/4
4) 4/5

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MBA Other Question

A certain number when divided by a certain divisor,leaves a remainder of 20.When twice the number is divided by the same divisor,the remainder is 3.Find the 20th multiple of the divisor,?

1) 400
2) 1480
3) 740
4) 2960
5) 860
What is the least perimeter of an obtuse-angled triangle with integer sides, whose one acute angle is twice the other?

1) 45
2) 56
3) 65
4) 77