JEE MATHEMATICS MCQ: PROPERTIES OF TRIANGLES

1 Easy

1 of 1

Analyzing +4 | -1

If in a triangle

ABC

2\,\,\frac{{\cos \,\,A}}{a} + \frac{{\cos \,\,B}}{b} + 2\frac{{\cos \,\,C}}{c} = \frac{a}{{bc}} + \frac{b}{{ca}}

,

then the value of the angle

A

View answer and explanation

Correct option: C

\frac{\pi }{2}

Option D (

\cot \\,\alpha

) is correct because the given expression simplifies to

\cot \alpha

through repeated use of trigonometric identities.

More Questions from PROPERTIES OF TRIANGLES

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{p_1},{p_2},{p_3}

\Delta \;ABC

A,B,C

\Delta

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5k,\;6k,\;5k

k

\Delta \,ABC

a = \left( {b - c} \right)\sec \theta

\frac{{2\,\sqrt {bc} }}{{b - c}}\,\,\sin \,\,\frac{A}{2} =

\Delta \;ABC,\frac{{b + c}}{a}

\Delta = {a^2} - {\left( {b - c} \right)^2}

\Delta

\Delta \;ABC

\tan A

A

2 s