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If a/(sinA)=K , then the area of "DeltaA...

If `a/(sinA)=K ,` then the area of `"DeltaA B C"` in terms of `K` and sines of the angles is `(K^2)/4s in A\ s in B\ s in C` (b) `(K^2)/2s in A\ s in B\ s in C` `2K^2s in A\ s in B\ "sin"(A+B)` (d) none

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ALLEN-SOLUTION AND PROPERTIES OF TRIANGLE-All Questions
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  2. If in a triangle A B C angle B=90^0 then tan^2(A/2) is (b-c)/a (b) (b-...

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  3. If a/(sinA)=K , then the area of "DeltaA B C" in terms of K and sines ...

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  4. In a "DeltaA B C","\ "/"C"=60"\ "&\ /A=75. If D is a point on A C such...

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  5. In a DeltaABC, a semicircle is inscribed, whose diameter lies on the s...

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  6. In a triangle A B C , right angled at B , the inradius is (A B+B C-A C...

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  7. In an equilateral triangle, inradius r , circumradius R and ex-radius ...

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  8. In a triangle A B C ,(r1+r2)/(1+cosC) is equal to (2a b)/(c"Delta") (b...

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  9. With usual notations in a triangle A B C , if r1=2r2=2r3 then 4a=3b (b...

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  10. a, b, x are in A.P., a,b,y are in G.P. and a, b, z are in H.P. then:

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  11. In A B C , if r\ : r1: R=2\ : 12\ :5, where all symbols have their us...

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  12. If a , b ,\ A are given in a triangle and c1a n d\ c2 are two possible...

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  13. 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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  14. In a triangle A B C ,\ C D is the bisector of the angle Cdot If cosC/2...

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  15. The medians of a A B C are in 9c m ,\ 12 c m\ a n d\ 15 c m respectiv...

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  16. If ' O ' is the circum centre of the A B C and R1,\ R2,\ R3 are the r...

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  17. Two rays emanate from the point A and form an angle of 43 with one a...

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  18. In a A B C ,\ A=pi/3\ a n d\ b : c=2: 3. If tanalpha=(sqrt(3))/5,\ o<...

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  19. The value of (cosA)/(P1)+(cosB)/(P2)+(cosC)/(P3) is

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  20. Statement - I : The statement that circumradius and inradius of a t...

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