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In a DeltaABC, if 2s=a+b+cand(s-b)(s-c)=...

In a `DeltaABC`, if `2s=a+b+cand(s-b)(s-c)=xsin^(2).(A)/(2)`, then x =

A

bc

B

ca

C

ab

D

abc

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A
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Competitive Thinking
  1. IN triangleABC, (cosC+cosA)/(c+a)+(cosB)/(b)=

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  2. In DeltaABC, with usual notations, if a,b,c are in AP then acos^(2)((C...

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  3. In a DeltaABC, if 2s=a+b+cand(s-b)(s-c)=xsin^(2).(A)/(2), then x =

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  4. In triangle ABC, sin((A)/(2))sin((C)/(2))=sin((B)/(2)) and '2s' is the...

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  5. In triangleABC, if a=18, b=24, c=30, then cos((A)/(2))=

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  6. In DeltaABC,(a-b)^(2)cos^(2).(C)/(2)+(a+b)^(2)sin^(2).(C)/(2)=

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  7. If a, b, c are in A.P then cot(A/2),cot(B/2),cot(C/2) are in

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  8. In DeltaABC,tan.(A)/(2)+tan.(B)/(2)=

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  9. In DeltaABC,(cot.(A)/(2)+cot.(B)/(2))(asin^(2).(B)/(2)+bsin^(2).(A)/(2...

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  10. If the sides of a triangle are in A.P., then the cotangent of its half...

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  11. If c^(2)=a^(2) +b^(2), then 4s(s-a)(s-b)(s-c) is equal to

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  12. The area of an isosceles triangle is 9 cm^(2). If the equal sides are ...

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  13. The area of the triangle ABC,in which a=1,b=2angleC=60^(@) is

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  14. In DeltaABC,"if "a=1,b=2,angleC=60^(@),"then "4Delta^(2)+c^(2)=

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  15. In triangleABC, a^(2) sin2C + c^(2) sin2A=

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  16. If the area of a triangle ABC is given by Delta=a^(2)-(b-c)^(2), then ...

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  17. Let PQR be a triangle of area Delta with a = 2, b = 7/2 and c =5/2, wh...

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  18. If in a triangle ABC, b=sqrt3, c=1 and B-C-90^0, then angle A is

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  19. The range of Tan^-1x is

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  20. The domain of Sin^-1 ((2x+1)/3) is

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