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Angles A,B and C of a DeltaABC are in AP...

Angles A,B and C of a `DeltaABC` are in `AP. If b/c =(sqrt3)/(sqrt2),` then `angleA` is equal to

A

`pi/6`

B

`pi/4`

C

`(5pi)/(12)`

D

`pi/2`

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ARIHANT MATHS-PROPERTIES AND SOLUTION OF TRIANGLES -Exercise For Sesssion 1
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  6. If in a DeltaABC, (a^(2)-b^(2))/(a ^(2)+b^(2))=(sin (A-B))/(sin (A+B))...

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  7. In any triangle A B C , prove that: (a^2sin(B-C))/(sinB+s in C)+(b^2si...

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  11. In a Delta ABC, (a+b+c) (b+c-a) = gamma bc if

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  12. If : a = 9, b = 8 and c = x satisfies 3 cos C = 2, then : x =

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  13. In DeltaABC, if sin^2 A+ sin^2 B = sin^2 C, then the triangle is

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  14. The lengths of the sides of a triangle are alpha-beta, alpha+beta and ...

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  15. In any triangle, (1+ cos (A-B)cos C)/(1+cos (A-C)cos B)=

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  17. In a DeltaABC, a ^(2) cos 2B+b^(2) cos 2A+2ab cos (A-B)=

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  18. In any DeltaABC, 2 [bc cos A + ca cos B+ ab cos C]=

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  19. In a DeltaABC, tan ""1/2 (A+B) . Cot""1/2(A-B) is equal to

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  20. If in a Delta ABC, b =sqrt3, c=1 and B-C =90^(@), then angle A is

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