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If cos A+cos B+2cos C=2 then the sides o...

If `cos A+cos B+2cos C=2` then the sides of the ` A B C` are in A.P. (b) G.P. (c) H.P. (d) none

A

A.P.

B

H.P.

C

G.P.

D

none of these

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ML KHANNA-PROPERTIES OF TRIANGLES -Problem Set (2)(MULTIPLE CHOICE QUESTIONS)
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  4. The straight roads intersect at an angle of 60°. A bus on one road is ...

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  7. If in a triangles a cos^(2)(C/2)+c cos^(2)(A/2)=(3b)/2, then the sides...

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  8. In any DeltaABC, prove that (a-b)^(2)cos^(2)""C/2+(a+b)^(2)sin^(2)""C/...

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  9. If cos A+cos B+2cos C=2 then the sides of the A B C are in A.P. (b) G...

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  10. In a triangle ABC with fixed base BC, the vertex A moves such that cos...

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  11. If in a triangle ABC, 2 (cos A)/(a)+(cos B)/(b)+2(cos C)/c=(a)/(bc)+b/...

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  12. In Delta ABC, (a + b+ c) (b + c -a) = kbc if

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  13. In a triangle ABC, 2ac sin((A-B+C)/2) =

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  14. In a A B C , prove that: (b^2-c^2)cotA+(c^2-a^2)cot B+(a^2-b^2)cotC=0

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  15. In any DeltaABC, prove that ((b^(2)-c^(2)))/a^(2)"sin 2a"+((c^(2)-a^(2...

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  16. The sides of a triangle ABC are 6 , 7 , 8 and the smallest angle being...

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  17. The sides of a triangle ABC are 6, 7, 8, the smallest angle being C th...

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  18. The sides of a triangle ABC are 6, 7, 8, the smallest angle being C th...

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  19. In a triangle cot A:cot B:cot C = 30:19:16 " then " a:b:c

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  20. The sids of a triangle aresqrt((b^2+c^2)),sqrt((c^2+a^2)),sqrt((a^2+b^...

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