In ` A B C ,` if `b^2+c^2=2a^2,` then value of `(cotA)/(cotB+cotC)` is `1/2` (b) `3/2` (c) `5/2` (d) `5/2`

In A B C , if cotA+cotB+cotC=0 then find the value of cosAcos BcosC

If in A B C ,A C is double of A B , then the value of cot(A/2)cot((B-C)/2) is equal to 1/3 (b) -1/3 (c) 3 (d) 1/2

The least value of 2sin^2theta+3cos^2theta is 1 (b) 2 (c) 3 (d) 5

In A B C ,(cot A/2+cotB/2)(asin^2B/2+bsin^2A/2)= cotC (b) ccotC (c) cotC/2 (d) ccotC/2

In triangle A B C , if r_1=2r_2=3r_2, then a : b is equal to 5/4 (b) 4/5 (c) 7/4 (d) 4/7

In triangle A B C , if cotA *cotC=1/2a n dcot B* cotC=1/(18), then the value of tanC is

Let Aa n dB are events of an experiment and P(A)=1//4, P(AuuB)=1//2, then value of P(B//A^c) is a. 2//3 b. 1//3 c. 5//6 d. 1//2

Let A B C be a triangle. Let A be the point (1,2),y=x be the perpendicular bisector of A B , and x-2y+1=0 be the angle bisector of /_C . If the equation of B C is given by a x+b y-5=0 , then the value of a+b is (a) 1 (b) 2 (c) 3 (d) 4

In A B C ,cotA/2+cotB/2+cotC/2 is equal to Delta/(r^2) (b) ((a+b+c)^2)/(a b c)2R (c) Delta/r (d) Delta/(R r)

If a^2x^4+b^2y^4=c^6, then the maximum value of x y is (a) (c^2)/(sqrt(a b)) (b) (c^3)/(a b) (c) (c^3)/(sqrt(2a b)) (d) (c^3)/(2a b)