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If b = 20 , c = 21 ," and " sin A = 3/5 ...

If `b = 20 , c = 21 ," and " sin A = 3/5 ` then a =

A

13

B

14

C

15

D

16

Text Solution

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A
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AAKASH SERIES-PROPERTIES OF TRIANGLES-LECTURE SHEET EXERCISE - I ( Straight Objective Type Questions )
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  2. O is the circumcentre of the triangle ABC and R(1), R(2), R(3) are th...

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  3. If b = 20 , c = 21 ," and " sin A = 3/5 then a =

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  4. If the sides of a triangle are 4 cm, 5 cm, 6 cm then ratio of the cosi...

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  5. In Delta ABC , 2ac sin ""( 1)/(2) (A-B+C)=

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  6. In triangle ABC , a = 4, b = 3 and angle A = 60^(@) . Then c is root...

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  7. In a Delta ABC , if D is the mid point of BC and AD is perpendicular ...

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  8. The base of a triangle is 80 and one of base angle is 60^(@) . If the...

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  9. If the sides of a triangle are in A.P and greatest angle exceeds the l...

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  10. If D is mid point of the side BC of a triangle ABC and AD is perpendic...

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  11. Two circles of radii a and b cut each other at an angle theta then len...

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  12. In the given figure, AB is the diameter of the circle centered at O. I...

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  13. In triangle ABC, D is mid point of BC, if 'AD' is perpendicular to 'AC...

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  14. With usual notation , if in triangle ABC, (b + c)/11 = (c + a)/12 = (...

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  15. The sides of a triangle are three consecutive natural numbers and its ...

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  16. In Delta ABC , 2ac sin ""( 1)/(2) (A-B+C)=

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  17. Let ABC be a triangle such that angle ACB = pi//6 and c denote the le...

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  18. If the lengths of the sides of triangle are 3, 5, and 7, then the larg...

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  19. If in a triangle ABC , a^(2) Cos^(2) A = b^(2) + c^(2) , then

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  20. The side of a triangle are in the ratio 1 : sqrt3 : 2, then the angles...

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