JEE MATHEMATICS MCQ: PROPERTIES OF TRIANGLES

1 Easy

1 of 1

Application +4 | -1

In a

\Delta \;ABC,a\left( {{{\cos }^2}B + {{\cos }^2}C} \right) + \cos A\left( {c\cos C + b\cos B} \right)

is equal to

View answer and explanation

Correct option: A

a

Option A (

a

) is correct because the given expression simplifies to

a

using trigonometric identities and projection formulas.

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2 s