JEE MATHEMATICS MCQ: PROPERTIES OF TRIANGLES

1 Easy

1 of 1

Application +4 | -1

In a

\Delta ABC,a,c,A

are given and

{b_1},{b_2}

are two values, if the third side

b

such that

{b_2} = 2{b_1}

, then

\sin A

is equal to

View answer and explanation

Correct option: B

\sqrt {\frac{{9{a^2} - {c^2}}}{{8{c^2}}}}

Option B

\sqrt {\frac{{9{a^2} - {c^2}}}{{8{c^2}}}}

is correct because it is derived by using the cosine rule and the given condition

{b_2} = 2{b_1}

More Questions from PROPERTIES OF TRIANGLES

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\Delta \;ABC

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k

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

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\Delta

\Delta \;ABC

\tan A

A

2 s