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In Delta ABC, if A,B,C are in A.P then ...

In `Delta ABC`, if A,B,C are in A.P then `(a+c)/sqrt(a^2-ac+c^2)=`

A

`cos ((A-C)/2)`

B

`sin ((A-C)/2)`

C

`2 cos ((A-C)/2)`

D

`2 sin ((A-C)/2)`

Text Solution

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The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-PROPERTIES OF TRIANGLES -EXERCISE 1A
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  4. In Delta ABC, if a,b,c are in A.P the greatest angle is A and least is...

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  5. In Delta ABC, if x=tan((B-c)/2)tan""A/2,y=tan((C-A)/2)tan""B/2,z=tan(...

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  7. In Delta ABC, if a sin^2""C/2+c sin^2""A/2 in terms of s,a,b,c is

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  9. In Delta ABC, (b-c)^2 +4bc sin^2 (A//2)=

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  10. In Delta ABC, if b=(c+a) cos theta, then sin theta=

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  11. In Delta ABC, if c=(a-b) sec theta, then tan theta=

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  12. In Delta ABC, if c=(a+b) sin theta and cos theta =(ksqrtab)/(a-b), the...

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  13. In Delta ABC, if a(b cos C+ c cos B)=2ka^2, then k =

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  14. In Delta ABC, if tan theta =(a+b)/(a-b) tan""C/2, then c=

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  15. If tan.(C-A)/(2)=k cot.(B)/(2) then find k .

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  16. In Delta ABC, if tan""A/2=t cot ((B-C)/2), then t=

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  17. If the area of a triangle satisfies the relation Delta =a^2 -(b-c)^2, ...

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  18. In Delta ABC, if a,b,c are in A.P, then tan""A/2 tan""C/2=

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  19. In Delta ABC, if tan""A/2,tan""B/2, tan""C/2 are in H.P, then a,b,c ar...

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  20. In Delta ABC, if a/c=(sin(A-B))/(sin (B-C)), then a^2,b^2,c^2 are in

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