In triangle ABC, line joining the circumcenter and orthocentre is parallel to side AC, then the value of t a n AtanCi se q u a lto sqrt(3) (b) 3 (c) 3sqrt(3) (d) none of these

Two medians drawn from the acute angles of a right angled triangle intersect at an angle pi/6dot If the length of the hypotenuse of the triangle is 3u n i t s , then the area of the triangle (in sq. units) is sqrt(3) (b) 3 (c) sqrt(2) (d) 9

Find the values of a and b in each of the following (sqrt3+1)/(sqrt3-1)=a+bsqrt3

If A is the area and 2s is the sum of the sides of a triangle, then (a) Alt=(s^2)/4 (b) Alt=(s^2)/(3sqrt(3)) (c) 2RsinAsinBsinC (d) none of these

Find the angles of the triangle whose sides are 3+ sqrt3, 2sqrt3 and sqrt6.

One angle of an isosceles triangle is 120^0 and the radius of its incricle is sqrt(3)dot Then the area of the triangle in sq. units is (a) 7+12sqrt(3) " " (b) 12-7sqrt(3) 12+7sqrt(3) " " (d) 4pi

Find the values of a and b in each of the following (5+2sqrt3)/(7+4sqrt3)=a-bsqrt3

If the angle A ,Ba n dC of a triangle are in an arithmetic propression and if a , ba n dc denote the lengths of the sides opposite to A ,Ba n dC respectively, then the value of the expression a/csin2C+c/asin2A is (a) 1/2 (b) (sqrt(3))/2 (c) 1 (d) sqrt(3)

In an equilateral triangle, three coins of radii 1 unit each are kept so that they touch each other and also the sides of the triangle. The area of the triangle is 2sqrt(3) (b) 6+4sqrt(3) 12+(7sqrt(3))/4 (d) 3+(7sqrt(3))/4

Find the value of a and b in each of the following : (3+sqrt2)/(3-sqrt2)=a+bsqrt2 .

Let the angles A, B, C of triangle ABC be in A.P. and let b:c= sqrt3:sqrt2 . Then angle A is :