Home
Class 11
MATHS
In a triangle ABC,(c^2 +a^2 -b^2)/(2ca) ...

In a `triangle ABC`,`(c^2 +a^2 -b^2)/(2ca)` is:

A

cosB

B

cosx

C

`tan(c/2)`

D

a

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRY

    PREMIERS PUBLISHERS|Exercise PROBLEMS FOR PRACTICE|27 Videos

  • SETS,RELATIONS AND FUNCATIONS

    PREMIERS PUBLISHERS|Exercise II. Choose the correct option for the following. (M.C.Q)|35 Videos

  • TWO DIMENSIONAL ANALYTICAL GEOMETRY

    PREMIERS PUBLISHERS|Exercise PROBLEM FOR PRACTICE (CHOOSE THE CORRECT OPTION)|28 Videos

Similar Questions

Explore conceptually related problems

In any triangle ABC ,c^2 sin 2 B + b^2 sin 2 C is equal to

If in a triangle ABC, (bc)/(2 cos A) = b^(2) + c^(2) - 2bc cos A then prove that the triangle must be isosceless

In a triangle ABC, prove that (a^(2)+b^(2))/(a^(2)+c^(2))=(1+cos (A-B) cos C)/(1+cos (A-C) cos B)

In any triangle ABC, if 2Delta a-b^(2)c=c^(3) , (where Delta is the area of triangle), then which of the following is possible ?

In a triangle ABC, prove that b^(2) sin 2C+c^(2) sin 2B=2bc sin A .

In a triangle ABC, prove that (b + c)/(a) le cosec.(A)/(2)

In a triangle ABC if 2Delta^(2)=(a^(2)b^(2)c^(2))/(a^(2)+b^(2)+c^(2)) , then it is

In a triangle ABC, sin^(2)A + sin^(2)B + sin^(2)C = 2 , then the triangle is

IF in triangle ABC a cos ^2 ((C )/(2 )) c cos ^2 ((A) /(2 )) = (3 b)/(2) then the sides a,b,and c