[" 7.In "Delta ABC,a=8,b=10" and "c=12." Then "C" is equal "],[" to: (a) "(A)/(2)" (b) "2A" (c) "3A" (d) none of these "]

In a triangle ABC, if a = 2, b = 3 and c=4 , then cos A is equal to

In a triangle ABC, if a = 2, b = 3 and c=4 , then cos A is equal to

In a triangle ABC, A = 8, b = 10 and c = 12. What is the angle C equal to ?

In a triangle ABC, A = 8, b = 10 and c = 12. What is the angle C equal to ?

In Delta ABC, if a=2b and A=3B, then the value of (c)/(b) is equal to

If a ,b ,and c are in A.P., then a^3+c^3-8b^3 is equal to (a). 2a b c (b). 6a b c (c). 4a b c (d). none of these

If a ,b ,and c are in A.P., then a^3+c^3-8b^3 is equal to (a). 2a b c (b). 6a b c (c). 4a b c (d). none of these

A\ (6,3),\ B(-3,5),\ C(4,-2)\ a n d\ D(x ,3x) are four points. If "Delta"D B C :"Delta"A B C=1:2, then x is equal to a. 11/8 b. 8/11 c. 3 d. none of these

In a triangle ABC, a^4+b^4+c^4=2a^2b^2+b^2c^2+2a^2c^2 then sinA is equal to (A) 1/sqrt(2) (B) 1/2 (C) sqrt(3)/2 (D) none of these

If in a Delta ABC, a, b, c are in A.P . Then cos ((A- C)/( 2)) is equal to