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If sides a,b,c of Delta ABC are in A.P.,...

If sides a,b,c of `Delta ABC` are in A.P., then : `sin (A/2) cdot sin (C/2)/(sin (B/2) = `

A

1

B

`1/2`

C

`2`

D

`-1`

Text Solution

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The correct Answer is:
B
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MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS-MULTIPLE CHOICE QUESTIONS - PART - B : MASTERING THE BEST
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  2. In Delta ABC, cscA (sin B cos C + cos B sin C) =

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  3. If sides a,b,c of Delta ABC are in A.P., then : sin (A/2) cdot sin (C...

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  4. If, in a Delta ABC, a = 6cm , b = 8 cm, c = 10cm, then : sin 2A =

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  5. In DeltaABC if /C=90^@ then R+r=

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  6. In Delta ABC, (cos((B-C)/2))/(cos (A/2))=

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  7. In DeltaABC, if sin A sin B=(ab)/(c^(2)), then the triangle is

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

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

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  10. In Delta ABC, if : a = 2 cm , b = 3cm and c = 4cm, then /A =

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  11. If : a = 2, b = 3, c = 5 in Delta ABC, then : /C=

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  12. If one side of a triangle is double the other, and the angles on oppos...

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  13. In a triangle ABC, if (cos A)/(a) =(cos B)/(b ) =(cos C)/(c) and the ...

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  14. In a A B C ,if=2,/B=60^0a n d/C=75^0 , then b= sqrt(3) (b) sqrt(6) ...

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  15. In triangleABC, If A= 30^(@), b=8, a=6 where B = sin^(-1)x, then: x=

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  16. In Delta ABC, if : sin(A/2) .sin (C/2) = sin (B/2) then : semiperimete...

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  17. In Delta ABC, if : a = 2, b = 3 and sin A = 2//3, then : /B =

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  18. In Delta ABC, if : a = 5, b = 4, A = pi/2 + B, then : /C =

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  19. In Delta ABC, if : A = 30^(@), C = 60^(@), a =sqrt(2) then b and c

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  20. If, in a Delta ABC, angle C is 45^(@) then : (1 + cot A) (1 + cot B)...

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