In triangle `A B C ,2a csin(1/2(A-B+C))` is equal to `a^2+b^2-c^2` (b) `c^2+a^2-b^2` `b^2-c^2-a^2` (d) `c^2-a^2-b^2`

In a Delta ABC,2ac sin((A-B+C)/(2)) is equal to (a)a^(2)+b^(2)-c^(2)(b)c^(2)+a^(2)-b^(2)(c)b^(2)-c^(2)-a^(2)(d)c^(2)-a^(2)-b^(2)

In a A B C ,2a csin((A-B+C))/2= (A) a^2+b^2+c^2 (B) c^2+a^2-b^2 (C) b^2-c^2-a^2 (D) c^2-a^2+b^2

In a A B C(b csin^2A)/(cos A+cosB cos C) is equal to b^2+C^2 b.b c c. a^2 d. a^2+b c

In a triangle A B C ,\ (a^2-b^2-c^2)tanA+(a^2-b^2+c^2)tanB is equal to (a^2+b^2-c^2)tanC (b) (a^2+b^2+c^2)tanC (b^2+c^2-a^2)tanC (d) none of these

[ 148.In Delta ABC,(sin(A-B))/(sin(A+B)) is equal to [ (1) (a^(2)-b^(2))/(c^(2)), (2) (a^(2)+b^(2))/(c^(2)) (3) (c^(2))/(a^(2)-b^(2)), (4) (c^(2))/(a^(2)+b^(2))]]

In a triangle ABC , (a^2-b^2-c^2) tan A +(a^2-b^2+c^2) tan B is equal to

A plane makes intercepts O A ,O Ba n dO C whose measurements are a,b and c on the O X ,O Ya n dO Z axes. The area of triangle A B C is a. 1/2(a b+b c+c a) b. 1/2a b c(a+b+c) c. 1/2(a^2b^2+b^2c^2+c^2a^2)^(1//2) d. 1/2(a+b+c)^2

In a triangle A B C ,(r_1+r_2)/(1+cosC) is equal to (2a b)/(c"Delta") (b) ((a+b))/(c"Delta") (a b c)/(2"Delta") (d) (a b c)/("Delta"^2)

If any triangle ABC, that: (a sin(B-C))/(b^(2)-c^(2))=(b sin(C-A))/(c^(2)-a^(2))=(csin(A-B))/(a^(2)-b^(2))