JEE MATHEMATICS MCQ: PROPERTIES OF TRIANGLES

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Application +4 | -1

In any

\triangle A B C

a \cos A+b \cos B+c \cos C

is equal to

View answer and explanation

Correct option: D

4 R \sin A \sin B \sin C

Option D (

4 R \sin A \sin B \sin C

) is correct because by using the sine rule and trigonometric identities, the expression simplifies to

4 R \sin A \sin B \sin C

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