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tan 54⁰ can be expressed as

(a) (cos 90 + sin 90)/(cos 90 – sin 90) (b) (cos 90 – sin 90)/(cos 90 + sin 90)... View Article

Solution: x2 + 7x = 7 x2 + 7x – 7 = 0 Using quadratic formula x = [-b±√(b2– 4ac)]/2a... View Article

Solution: ((1200/x) + 2) (x – 10) – 1200 = 60 ((1200/x) + 2) (x – 10) = 1200 +... View Article

(a) 9090095 (b) 90090090 (c) 909090 (d)None of these Solution: We know 1 million = 10,00,000 So 90 million =... View Article

(A) xy (B) x+y (C) xy/(x+y) (D) (x+y)/xy Solution: We know x-1 = 1/x (x-1+y-1)-1 = (1/x + 1/y)-1 =... View Article

(A) A = {1,2} and B = {1} (B) A = {1,2} and B = {1,2,3} (C) A = {1,2,3}... View Article

Solution: We know π radian = 180 degrees. So 1 radian = 180/π 1/4 radian = (180/π)×1/4 = 45/π =... View Article

(A) 7 (B) 8 (C) 9.5 (D) 10 Solution: We know sin (90-x) = cos x sin2(90-x) = cos2 x... View Article

Solution: The points of the intersection of the medians of a triangle is the centroid. Let A(-1, 0), B(5, -2)... View Article

Solution: We know (a-b)2 = a2– 2ab + b2 95 = 100-5 95 × 95 = 952 = (100 –... View Article

Answer: Square root of 2352 = 48.497 It is not a perfect square. Let us prime factorise 2352. 2352 =... View Article

(A) some (B) any (C) little (D) much Answer: A determiner denotes whether the noun is referring to a definite... View Article

Solution: 13x – 5 = 3/2 13x = 3/2 + 5 = (3+10)/2 = 13/2 => x = 1/2

(a) 15 (b) 20 (c) 25 (d) 35 Solution: ⅕: 1/x = 1/x :1/125 Product of extremes = product of... View Article

There is no Hindu Analysis for today since there is no edition of ‘The Hindu’ newspaper.

1) 4.65 mA 2) 0.045 A 3) 0.45 A 4) 4.65 A Answer:3) 0.45 A Solution: η = 88 %... View Article

1) 2.5 A 2) 5 A 3) 0.25 A 4) 0.5 A Answer: 3) 0.25 A Solution: Output power is half... View Article

1) 3.67 A 2) 2.67 A 3) 1.67 A 4) 2.40 A Answer: 3) 1.67 A Solution: V1I1 = V2I2 4000... View Article

1) DC motor and AC generator 2) DC generator and AC motor 3) DC motor and DC generator 4) Both... View Article

1) one 2) greater than one 3) less than one 4) the ratio greater or less than one depends on... View Article