JEE MATHEMATICS MCQ: PROPERTIES OF TRIANGLES

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Application +4 | -1

\triangle A B C,(a-b)^2 \cos ^2 \frac{C}{2}+(a+b)^2 \sin ^2 \frac{C}{2}

equal to

View answer and explanation

Correct option: C

c^2

Option C (

c^2

) is correct because by expanding the given expression and using the cosine rule, it simplifies to

c^2

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