Filters
Upload date
Duration
Sort By

Videos
Watch :3 01:00
If acosθ + bsinθ = 3 and asinθ - bcosθ = 4, then a² + b² has the value : (1) 25 (2)..| Doubtify JEE
100 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
If P.E. of a system is given by relation U = A/x² - B/x, where A and B are positive...| Doubtify JEE
34 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
Equal masses of three liquids A, B and C have temperatures 10°C, 25°C and 40°C...| Doubtify JEE
65 views • 7 months ago Doubtify JEE Main
Watch :3 01:00
If tanα + cotα = a, then the value of tan⁴α + cot⁴α is equal to : (1) a⁴ + 4a² + 2...| Doubtify JEE
51 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
If sin⁴x / 2 + cos⁴x / 3 = 1/5, then the value of cot²x is equal to:...| Doubtify JEE Main
17 views • 1 month ago Doubtify JEE Main
Watch :3 01:00
The value of sin⁶u + cos⁶u - 1 / sin⁴u + cos⁴u - 1 (whereever defined) is...| Doubtify JEE Main
47 views • 1 month ago Doubtify JEE Main
Watch :3 01:00
If A lies in the second quadrant and 3tanA + 4 = 0, then the value of 2cotA - 5cosA...| Doubtify JEE
81 views • 1 year ago Doubtify JEE Main
Watch :3 01:00
If the minimum value of x² + 2x + 3 is m and maximum value of -x² + 4x + 6 is...| Doubtify JEE Main
39 views • 1 week ago Doubtify JEE Main
Watch :3 01:00
Assuming the temperature to be constant, as we go up in the atmosphere, the velocity..| Doubtify JEE
59 views • 10 months ago Doubtify JEE Main
Watch :3 01:00
What is Microprocessor ?
11 views • 1 month ago Doubtify BTECH CSE
Watch :3 01:00
For the equation |x²| + |x| - 6 = 0, the roots are:...| Doubtify JEE Main
46 views • 1 week ago Doubtify JEE Main
Watch :3 01:00
The average acceleration over one period of oscillation for a simple harmonic motion..| Doubtify JEE
80 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
Two S.H.Ms. are given by y₁ = asin(π/2t + π/2) and y₂ = bsin(2π/3t + π/2). The phase..| Doubtify JEE
71 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
A hollow spherical ball is filled up with sand. Sand comes out through a hole at...| Doubtify JEE
37 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
The temperature gradient in a rod of 0.5 m long is 80°C/m. If the temperature of...| Doubtify JEE
68 views • 6 months ago Doubtify JEE Main
Watch :3 01:00
The value of cos10° - sin10° is : (1) Positive (2) Negative (3) 0 (4) 1...| Doubtify JEE
109 views • 1 year ago Doubtify JEE Main
Watch :3 01:00
History of Microprocessor
5 views • 1 month ago Doubtify BTECH CSE
Watch :3 01:00
The general solution of sec θ + tan θ = √3 is:...| Doubtify JEE Main
195 views • 1 month ago Doubtify JEE Main
Watch :3 01:00
The value of (10⁴ + 324) (22⁴ + 324) (34⁴ + 324) (46⁴ + 324) (58⁴ + 324) / (4⁴ +...| Doubtify NTSE
8 views • 1 month ago Doubtify NTSE
Watch :3 01:00
If mcosec θ + ncot θ = 2 and m²cosec²θ - n²cot²θ = 5, then 81/m² - 1/n² is...| Doubtify JEE Main
26 views • 1 month ago Doubtify JEE Main
Watch :3 01:00
The solution of differential equation dy / dx + 2xy / (1 + x²) = 1 / (1 + x²)² is:...| Doubtify JEE
31 views • 4 months ago Doubtify JEE Main
Watch :3 01:00
A boy is swinging in a swing. If he stands, the time period will : (1) First...| Doubtify JEE
134 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
The value of (cosecA.cosecB + cotA.cotB)² - (cosecA.cotB + cosecB.cotA)² is...| Doubtify JEE
40 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
A body executing S.H.M. along a straight line has a velocity of 3 m/s when it is at...| Doubtify JEE
59 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
Choose the incorrect statement.(1) Phase constant of SHM depends upon initial...| Doubtify JEE
55 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
Important Formula Chart for Mechanical Properties of Solids | JEE Formula Chart | Doubtify JEE
112 views • 1 year ago Doubtify JEE Main
Watch :3 01:00
In which of the following cases electric field at point P is non-zero?...| Doubtify JEE
66 views • 10 months ago Doubtify JEE Main
Watch :3 01:00
Important Formula Chart for Mechanical Properties of Solids 2 | JEE Formula Chart | Doubtify JEE
54 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
A simple pendulum of mass 'm', swings with maximum angular displacement of 60°...| Doubtify JEE
61 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
Two points charge +4q and +q are separated by distance r, where should a third point..| Doubtify JEE
125 views • 10 months ago Doubtify JEE Main
Watch :3 01:00
If the difference of the roots of the equation x² - px + q = 0 is unity, then...| Doubtify JEE Main
29 views • 3 weeks ago Doubtify JEE Main
Watch :3 01:00
Find the smallest positive number from the numbers below: [Andhra Pradesh, NTSE...| Doubtify NTSE
5 views • 1 month ago Doubtify NTSE
Watch :3 01:00
Let α and β are the roots of the equation x² + x + 1 = 0, then...| Doubtify JEE Main
18 views • 2 weeks ago Doubtify JEE Main
Watch :3 01:00
Different lengths of pendulum are taken from Earth's surface to h = R. Time period...| Doubtify JEE
64 views • 11 months ago Doubtify JEE Main
Watch :3 01:00
Given 5A9 + 2C8 = 1114, then the maximum value of C is: [Bihar, Stage - 1, 2014-15]..| Doubtify NTSE
5 views • 1 month ago Doubtify NTSE
Watch :3 01:00
If α and β are the roots of the equation x² - px + 16 = 0, such that α² + β²...| Doubtify JEE Main
46 views • 2 weeks ago Doubtify JEE Main