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Let f (x+y)=f(x). f(y) for all x and y f...

Let `f (x+y)=f(x). f(y)` for all x and y `f(1)=2` If in a triangle `ABC, a =f (3),b=f(1)+f (3), c=f (2)+f (3), then 2A is equal to

A

C

B

2C

C

3C

D

4C

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A
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ARIHANT MATHS-PROPERTIES AND SOLUTION OF TRIANGLES -Exercise (Single Option Correct Type Questions)
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  3. Let f (x+y)=f(x). f(y) for all x and y f(1)=2 If in a triangle ABC, a ...

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  8. If R(1) is the circumradius of the pedal triangle of a given triangle ...

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  9. If in a triangle (1-(r(1))/(r (2)))(1-(r(1))/(r (3)))=2. then show tha...

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  10. If the median AD of a triangle ABC makes an angle theta with side, AB,...

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  11. Differentiate the following w.r.t x (sinx-cosx)^(sinx-cosx)

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

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  13. In the DeltaABC, if (a ^(2) +b^(2))sin (A-B) =(a^(2) -b^(2)) sin (A+B...

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  14. Differentiate the following w.r.t x (5x)^(3cos2x)

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  15. If a, b,c be the sides of a triangle ABC and if roots of equation a(b-...

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  16. The ratio of the area of a regular polygon of n sides inscribed in a c...

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  17. In any triangle ABC sum (sin^2A+sinA+1)/sinA is always greater than or...

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  18. If the incircel of the triangle ABC, through it's circumcentre, then t...

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  19. The perimeter of a triangle ABC is six times the arithmetic mean of ...

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