If [a + (1/a)]2 – 2[a – (1/a)] = 12, then which of the following is a value of 'a'?
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For triangle ABC, find equation of median AD if co-ordinates of points A, B and C are (2,4), (3,0) and (5,2) respectively?
If cos2x + cos4x = 1, then tan2x + tan4x =
Cost of 4 pens, 6 note books and 9 files is Rs 305. Cost of 3 pens, 4 notebooks and 2 files is Rs 145. What is the cost (in Rs) of 5 pens, 8 notebooks and 16 files?
If 1/√(1 - sin2A) = x, then the value of x is
129 meter from the foot of a cliff on level of ground, the angle of elevation of the top of a cliff is 30°. The height of this cliff is
What is the difference of the cube and square of the common root of (x2 – 8x + 15) = 0 and (y2 + 2y – 35) = 0?
The total surface area of a hemisphere is 462 sq cm, what is its curved surface area? (Take π = 22/7)
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