JEE MATHEMATICS MCQ: PROPERTIES OF TRIANGLES

1 Hard

1 of 1

Application +4 | -1

In the ambiguous case, if

a,\,\,b

and

A

are given and

{c_1},\,{c_2}

are two values of the third side

c

, then

c_1^2 - 2\,{c_1}{c_2}\,\,\cos \,\,2A + c_2^2 = \;

View answer and explanation

Correct option: A

4{a^2}\,\,{\cos ^2}A

Option A (

4{a^2}\,{\cos ^2}A

) is correct because it results from trigonometric identities and algebraic manipulation of the given conditions in the ambiguous case.

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