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( b^(2) -c^(2))/( a^(2)) =...

` ( b^(2) -c^(2))/( a^(2)) =`

A

` ( sin (B-C))/( sin (B+ C) ) `

B

` ( cos (B-C))/( cos (B+ C) ) `

C

` (sin (B+C))/( sin (B- C) ) `

D

` (cos (B+C))/( cos (B- C) ) `

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AAKASH SERIES-PROPERTIES OF TRIANGLES-PRACTICE EXERCISE
  1. If a = 3, b =4 , sin A = 3/4 then angleB =

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  2. ( b^(2) -c^(2))/( a^(2)) =

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  3. Prove that (1+cos(A-B)cosC)/(1+cos(A-C)cosB)=(a^(2)+b^(2))/(a^(2)+c^(2...

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  4. If = 60 ^(@) , B= 30 ^(@) " then " a: b: c

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  5. If the angles of a triangle are in the ratio 1:2:7, then the ratio of ...

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  6. In Delta ABC , if a= sqrt3 + 1, b = 2, B = 45 ^(@) , then A =

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  7. In Delta ABC , if A =30 ^(@) , b= 8 , a = 6 B= sin ^(-1) x , then ...

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  8. In Delta ABC, if a=7,b=7sqrt3 and right angled at C, then c=

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  9. In Delta ABC , side c= 2 sqrt2 and angle A= 30 ^(@) and if the ...

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  10. If the sum of the squares of the sides of a triangles ABC is equal ...

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  11. If the sides of a triangles are in the ratio 2 : sqrt6 : sqrt3 + 1 ...

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  12. If the angles of a triangles are 30 ^(@) , 45 ^(@) and the include...

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  13. IF the perimeter of a triangle is 12 times the arithmetic mean of the ...

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  14. In Delta ABC , if b=c = R then A =

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  15. IF the angles of a triangle are in the ratio 2:3:5, then the ratio of ...

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  16. If the angles of a triangles are in the ratio 1: 5: 6 then the ratio...

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  17. In Delta ABC , if a= 2, b= 3 , c=4 then cos A =

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  18. In DeltaABC , if a =4 , b = 5, c= 60 ^(@) , then C =

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  19. If in a triangle ABC, the altitudes from the A,B,C on opposite sides a...

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  20. If the angles of a triangle are in A.P., a=2 c= 4 , then b=

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