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IF Delta ABC,if a tan A+b tan B=(a+b) ta...

IF `Delta ABC,if a tan A+b tan B=(a+b) tan ((A+B)/2)`, then the triangle is

A

Scalene

B

Right angled

C

Equilateral

D

Isosceles

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Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-REVISION EXERCISE-PROPERTIES OF TRIANGLES
  1. If (sin 3B)/(sinB)=((a^(2)-c^(2))/(2ac)) then a^(2),b^(2),c^(2) are in

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  2. In DeltaABC if r(1)=R then

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  3. IF Delta ABC,if a tan A+b tan B=(a+b) tan ((A+B)/2), then the triangle...

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  4. In triangle ABC, D is mid point of BC, if 'AD' is perpendicular to 'AC...

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  5. The sides of a right angled triangle are in A.P then they are in the r...

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  6. If the bisector angle A of the triangle ABC makes an angle theta with ...

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  7. In DeltaABC, AD is the altitude from A, if b gt c, C=23^(0), AD=(abc)/...

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  8. In DeltaABC, a=6,b=4 and cos (A-B)=4//5 then its area is

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  9. In a triangle ABC, medians AD and BE are drawn.IF angle D=4, angle DAB...

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  10. If the area of an isosceles triangle is sqrt2+1are vertical angle is 4...

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  11. In DeltaABC, if a=7 b=8, c=9 then the distance from the vertex B to th...

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  12. If the median of DeltaABC through A is perpendicular to AB then tan A+...

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  13. If the median AD of DeltaABC, makes an angle theta with AB then sin(A-...

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  14. The perimeter of a right angled triangle is 6 times the smaller side, ...

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  15. In Delta ABC, if (a-b) (s-c)= (b-c) (s-a) then r1,r2,r3 are in

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  16. In Delta ABC the roots of the equation x^3-(r+4R)x^2+s^2x-s^2r=0 are

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  17. In DeltaABC, the joining the circumcentre and incenre is parallel to B...

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  18. The sum of the radii of inscribed and circumscribed circles for an n s...

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  19. Ratio of area of the incircle to the area of triangle ABC

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  20. If the area of the triangle ABC is a^(2)-(b-c)^(2) then its circumradi...

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