If 13∆3 = 20, 12∆7 = 10 and 12∆5 = 14 then find the value of 16∆2?
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If x + y = 10 and x2 + y2 = 68, then find xy
∆XYZ is right angled at Y. If tanX = 15/8, then what is the value of sinZ ?
What is the value of the expression a3 - 5 + 2816a, when a = 2?
In the following question, select the missing number from the given series.
12, 15, 19, 24, 30, ?
The ratio of present ages of Rahul and his sister is 3 : 4. Before 10 years the ratio of their ages was 13:19. What is Rahul's present age (in years)?
What is the value of sec2θ + 1sec2θ - 1 x 12cotθ - tanθ ?
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