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Ask QuestionPosted by Siddharth Jangid 5 years, 3 months ago
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Posted by Siddharth Jangid 5 years, 3 months ago
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Posted by Siddharth Jangid 5 years, 3 months ago
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Posted by Confusion ??? Master ??? 5 years, 3 months ago
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Confusion ??? Master ??? 5 years, 3 months ago
Posted by Confusion ??? Master ??? 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
The angle of depression is the angle between the horizontal line and the observation of the object from the horizontal line. It is basically used to get the distance of the two objects where the angles and an object’s distance from the ground are known to us. Its an angle that is formed with the horizontal line if the line of sight is downward from the horizontal line.
Posted by Vanshika Bhuwad 5 years, 3 months ago
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Sia ? 4 years, 8 months ago
Given that
Resistance = R
Length = L
Thickness=d
Resistivity =ρ
Now when wire cuts in 4 equal parts
L'= L/4
i) We know that resistivity is a material properties and does not depends on the physical dimensions.So even wire cuts in 4 equal but still resistivity will remain same.
So the answer is, resistivity will be same.
ii) We know that
R = ρ L/A
When L become 1/4 th then resistance for each part is R'
R' = ρ L'/A
L'= L/4
R' = ρ L/4A
R'= R/4
It means that resistance will become one forth of initial resistance
a)Parallel connection:
We know that equivalent resistance given as
For given voltage parallel connection consume more power because it have low equivalent resistance.
Posted by Manish Soni 5 years, 3 months ago
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Posted by Akshat Panwar 5 years, 3 months ago
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Ambika Ambika 5 years, 3 months ago
Posted by Riya Tiwari 5 years, 3 months ago
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Yogita Ingle 5 years, 3 months ago
By using Euclids division algorithm
a = bq+r
where a is > b
so a = 867 and b=255
867=255 × 3+102
here r≠0 so a=255 and b=102
255=102×2+51
here r≠0 so a=102 and b=51
102=51×2+0
here r=0
so, Hcf of (867,255) is =51
Posted by Pranjal Jangid 5 years, 3 months ago
- 1 answers
Yogita Ingle 5 years, 3 months ago
kx2 + x -6 =0
put x =-2
k(-2)2 + (-2) - 6=0
4k -2 -6 = 0
4k - 8 = 0
4k = 8
Therefore,
k = 2
Posted by Pranjal Jangid 5 years, 3 months ago
- 1 answers
Yogita Ingle 5 years, 3 months ago
As given, points A( 1 , -2 ) ,B ( 3 , 6 ) and C ( 5 , 10 )
Let us assume that the vertex of point D is (x, y)
We know diagonal bisects each other,
So mid-point of AC = mid-point of BD……………. ( i )
Now, mid-point of
And mid-point of {tex}\mathrm{BD}=\frac{3+x}{2}, \frac{6+y}{2}{/tex}
Hence from equation (i) we can conclude that,
3+x=6
x=3
6+y=8
y=2
So vertex of D = (3, 2)
Posted by Pranjal Jangid 5 years, 3 months ago
- 1 answers
Yogita Ingle 5 years, 3 months ago
a = 1 d = 4-1 = 3
an = a + (n-1)d
a20 = 1 + (20-1)3
a20 = 1 + (19)3
a20= 1 + 57
a20= 58
Posted by Pranjal Jangid 5 years, 3 months ago
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Posted by Pranjal Jangid 5 years, 3 months ago
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Gaurav Seth 5 years, 1 month ago
Given AP is 1,4,7,10,.....
In given AP first term a=1, common difference d=3
Since, Sn= n/2[2a+(n−1)d] ....... sum of n terms
Put n=20 for sum of first 20 terms
S20=20/2 [2(1)+(20−1)3]
S20=10[2+57]
S20=590
Posted by Pranjal Jangid 5 years, 3 months ago
- 1 answers
Yogita Ingle 5 years, 3 months ago
Sum of first 5 multiples of 3:
Sum of an AP is: n/2 × (2a+(n−1)d)
a=3,d=3,n=5
Then,
Sum = 5/2 ×(2×3+(5−1)×(3))
= 5/2 ×(6+12)
= 5/2 ×18
= 5 ×9
= 45
Posted by Pranjal Jangid 5 years, 3 months ago
- 1 answers
Gaurav Seth 5 years, 1 month ago
let a = first term and d=common difference.
According to question,
7a7 = 11 a11
=>7(a+6d) = 11(a+10d)
=> 7a-11a = 110d-42d
=> -4a = 68d
=>a = -17d ......(1)
Now , a18 = a +17d
but a = -17 d ..by (1)
so put this value , we get,
a18=-17d +17d =0
Hence proved
Posted by Pranjal Jangid 5 years, 3 months ago
- 1 answers
Yogita Ingle 5 years, 3 months ago
a = 1 d = 4-1 = 3
an = a + (n-1)d
a10 = 1 + (10-1)3
a10 = 1 + (9)3
a10= 1 + 27
a10= 28
Posted by Pranjal Jangid 5 years, 3 months ago
- 1 answers
Gaurav Seth 5 years, 1 month ago
When a, b, and c are real numbers, a ≠ 0 and the discriminant is zero, then the roots α and β of the quadratic equation ax2+ bx + c = 0 are real and equal.
Posted by Pranjal Jangid 5 years, 3 months ago
- 2 answers
Yogita Ingle 5 years, 3 months ago
A quadratic polynomial has maximum three zeroes.
False, A quadratic polynomial has two zeroes.
Posted by Pranjal Jangid 5 years, 3 months ago
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Posted by Pranjal Jangid 5 years, 3 months ago
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Posted by Pranjal Jangid 5 years, 3 months ago
- 2 answers
Yogita Ingle 5 years, 3 months ago
If b2 - 4ac = 0 then the roots will be a real number because b and a are real.
Posted by Pranjal Jangid 5 years, 3 months ago
- 1 answers
Yogita Ingle 5 years, 3 months ago
(cosecA-cotA) (cosecA+cotA)
= cosec2 A - Cot2A
= cot2A + 1 - Cot2A (cot2A + 1 = cosec2A)
= 1
Posted by Pranjal Jangid 5 years, 3 months ago
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Posted by Pranjal Jangid 5 years, 3 months ago
- 1 answers
Yogita Ingle 5 years, 3 months ago
If sino = 3/5
Then, opposite side of the right angled triangle containing angle o = 3 and hypotenuse =5
Using pythagoras theorem, we get the adjacent side = 4
Now we have, coso =Adjacent/Hypotenuse=4/5
And cot o =Adjacent/Opposite= 3/4
3 cot o =3( 3/4) = 9/4
Posted by Pranjal Jangid 5 years, 3 months ago
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Posted by Bharat Kumar 5 years, 3 months ago
- 5 answers
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