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In a triangle ABC, if a=2,b=4,c=5 then c...

In a triangle ABC, if `a=2,b=4,c=5` then cosB=

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MOTION-SOLUTION OF TRIANGLE-EXERCISE - 2 (LEVEL I)
  1. If twice the square of the diameter of the circle is equal to half the...

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  2. In a triangle ABC, if a=2,b=4,c=5 then cosB=

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  3. In a DeltaABC, a =1 and the perrimeter is six times the AM of the sinc...

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  4. In a triangle ABC ( a sin B + b sin A)/(sqrt(sin A sin B)) = 4, /C = (...

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  5. In a triangle ABC is (a)/(1)= (b)/(sqrt(3)) = (c )/(2), then

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  6. In a DeltaABC, If A=30^@,b=2,c=sqrt3+1, then (C-B)/2 is

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  7. cot (A+B)/2.tan(A-B)/2= (a) (a+b)/(a-b) (b) (a-b)/(a+b)

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  8. In any triangle ABC,1-tan(A/2)tan(B/2)=

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  9. In a triangleABC, if 3tan (A/2) tan (C /2)=1, then sides a,b,c are in

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  10. If, in Delta ABC, a = 16, b = 24, c = 20, then : sin (A/2)= ....

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  11. In triangleABC, (b+a-c)tan((A)/(2))=

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  12. If, in Delta ABC, a = 2x, b = 2y and C = 120^(@) then the area of the ...

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  13. If the median AD of triangle ABC divides the angle BAC in the ratio 1:...

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  14. In a triangle ABC , let angleC=(pi)/2. If r is the in-radius and R is ...

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  15. In an isosceles triangle with base angle alpha and lateral side 4, Rr=

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  16. If I is the incentre of a triangle whose is radius and circumradius ar...

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  17. AD, BE and CF are the medians of triangle ABC whose centroid is G. If ...

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  18. Let 'l' is the length of median from the vertex A to the side BC of a ...

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  19. If in a /\ ABC the altitude from the vertices A,B,C on opposite side a...

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  20. If the radius of the circum-circle of an isosceles triangle PQR is equ...

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