Other Company Numerical Ability

cos 30d/sin 10d + cos 59d/sin 31d =?a)1 b)2 c)3 d)4

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Other Other Question

a shopkeeper purchased an article of 500 and marked the price as 1000. then decide to provide a three discount a%,b% and c% in such a way that a+b+C=30. then what can be range of profit percentage made by the shopkeeper in the transaction ? 1+x/1+sqrt(1+x) + 1-x/1-sqrt(1-x) = ? If x=(sqrt of 3)/2