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Select the correct option from the given alternatives:
If α is a root of 25cos2θ + 5cosθ – 12 = 0, `pi/2` < α < π, then sin2α is equal to
Concept: undefined >> undefined
Select the correct option from the given alternatives:
The cotangent of the angles `pi/3, pi/4 and pi/6` are in
Concept: undefined >> undefined
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Find the trigonometric functions of 225°.
Concept: undefined >> undefined
Answer the following:
Find the trigonometric functions of :
270°
Concept: undefined >> undefined
Answer the following:
Find the trigonometric functions of :
315°
Concept: undefined >> undefined
Answer the following:
Find the trigonometric functions of :
−150°
Concept: undefined >> undefined
Answer the following:
Find the trigonometric functions of :
−180°
Concept: undefined >> undefined
Answer the following:
Find the trigonometric functions of :
−210°
Concept: undefined >> undefined
Answer the following:
Find the trigonometric functions of :
−300°
Concept: undefined >> undefined
Answer the following:
Find the trigonometric functions of :
−330°
Concept: undefined >> undefined
Find variance and S.D. for the following set of numbers:
7, 11, 2, 4, 9, 6, 3, 7, 11, 2, 5, 8, 3, 6, 8, 8, 2, 6
Concept: undefined >> undefined
Find variance and S.D. for the following set of numbers:
65, 77, 81, 98, 100, 80, 129
Concept: undefined >> undefined
Compute variance and standard deviation for the following data:
| X | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
| F | 8 | 10 | 10 | 7 | 6 | 4 | 3 | 4 | 2 | 6 |
Concept: undefined >> undefined
Compute the variance and S.D.
| X | 31 | 32 | 33 | 34 | 35 | 36 | 37 |
| Frequency | 15 | 12 | 10 | 8 | 9 | 10 | 6 |
Concept: undefined >> undefined
Following data gives age of 100 students in a college. Calculate variance and S.D.
| Age (In years) | 16 | 17 | 18 | 19 | 20 | 21 |
| No. of Students | 20 | 7 | 11 | 17 | 30 | 15 |
Concept: undefined >> undefined
Find mean, variance and S.D. of the following data:
| Classes | 10 – 20 | 20 – 30 | 30 – 40 | 40 – 50 | 50 – 60 | 60 – 70 | 70 – 80 | 80 – 90 | 90 – 100 |
| Frequency | 7 | 14 | 6 | 13 | 9 | 15 | 11 | 10 | 15 |
Concept: undefined >> undefined
Find the variance and S.D. of the following frequency distribution which gives the distribution of 200 plants according to their height:
| Height (in cm) | 14 – 18 | 19 – 23 | 24 – 28 | 29 – 33 | 34 – 38 | 39 – 43 | 44 – 48 |
| No. of plants | 5 | 18 | 44 | 70 | 36 | 22 | 5 |
Concept: undefined >> undefined
The mean of 5 observations is 4.8 and the variance is 6.56. If three of the five observations are 1, 3 and 8, find the other two observations
Concept: undefined >> undefined
Select the correct option from the given alternatives :
The standard deviation of a distribution divided by the mean of the distribution and expressing in percentage is called:
Concept: undefined >> undefined
Select the correct option from the given alternatives :
If the S.D. of first n natural numbers is `sqrt(2)`, then the value of n must be ––––––.
Concept: undefined >> undefined
