Home
Class 12
MATHS
In a DeltaABC,"if "(sqrt(3)-1)a=2b,A=3B,...

In a `DeltaABC,"if "(sqrt(3)-1)a=2b,A=3B,` then C is a) `60^(@)` b)`120^(@)` c)`30^(@)` d)`45^(@)`

A

`60^(@)`

B

`120^(@)`

C

`30^(@)`

D

`45^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

The angle subtended at the point (1,2,3) by the points P(2, 4, 5) and Q(3,3,1) is a) 90^(@) b) 60^(@) c) 30^(@) d) 0^(@)

If log_(sqrt(3))5=a and log_(sqrt(3))2=b , then log_(sqrt(3))300 is equal to a) 2(a+b) b) 2(a+b+1) c) 2(a+b+2) d) a+b+4

If in a triangle ABC, a = 15, b = 36, c =39, then sin""C/2 is equal to :a) sqrt(3)/2 b) 1/2 c) 1/sqrt(2) d) -1/sqrt(2)

The x-axis, y-axis and a line passing through the point A(6,0) form a DeltaABC . If angleA=30^(@) , then the area of the Delta , in sq unit is a) 6sqrt(3) b) 12sqrt(3) c) 4sqrt(3) d) 8sqrt(3)

For any DeltaABC , prove that a(b cos C -c cos B) = b^2 - c^2

In a DeltaABC , if tan""(A)/(2)=(5)/(6),tan""(C )/(2)=(2)/(5) , then a)a, c, b are in AP b) a, b, c are in GP c)b, a, c are in AP d)a, b, c are in AP

The solution of int_(sqrt2)^(x) (dt)/(t sqrt( t^2 -1) )= (pi)/(12) is a)1 b)2 c)3 d)4

The value of "sin"(31)/(3)pi is a) (sqrt3)/(2) b) (1)/(sqrt2) c) (-sqrt3)/(2) d) (-1)/(sqrt2)

1/(cos80^(@))-sqrt(3)/(sin80^(@)) is equal to a) sqrt(2) b) sqrt(3) c)2 d)4

If a and b are positive numbers such that a gt b , then the minimum value of a sec theta- b tan theta (0 lt theta lt pi/2) is a) 1/sqrt(a^2-b^2) b) 1/sqrt(a^2+b^2) c) sqrt(a^2+b^2) d) sqrt(a^2-b^2)