JEE MATHEMATICS MCQ: COMPOUND ANGLES

1 Easy

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Analyzing +4 | -1

In a

\Delta \,PQR,\,\;\angle R = \frac{\pi }{2}

. If

\tan \,\,\frac{P}{2}

and

\tan \,\,\frac{Q}{2}

are the roots of the equation

a{x^2} + \,\,bx + c = 0\left( {a \ne 0} \right)

, then

View answer and explanation

Correct option: A

a + b = c

Option A (

a + b = c

) is correct because it is derived from the relationship between the roots of the quadratic equation and the fact that

P + Q = \frac{\pi}{2}

in the given triangle.

More Questions from COMPOUND ANGLES

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\tan \left( {A + B} \right) = p

\tan \left( {A - B} \right) = q

\tan \,\,2A

\cos \,\,x\,\,\cos \,\,y\,\,\sin \,\,\left( {x - y} \right) + \cos \,\,y\,\,\cos \,\,z\,\,\sin \,\,\left( {y - z} \right)

+ \cos \,\,z\,\,\cos \,\,x\,\,\sin \,\,\left( {z - x} \right) + \sin \,\,\left( {x - y} \right)\sin \,\,\left( {y - z} \right)\,\,\sin \,\,\left( {z - x} \right)

\sin \alpha, \cos \alpha

\sqrt{1+\sin \alpha \cos \alpha}

0<\alpha<\frac{\pi}{2}

\tan \,\,A = 2\,\,\tan \,\,B + \cot \,\,B,\;\;\mathrm{then}\;\,2\,\,\tan \left( {A - B} \right)\mathrm{\;}

A,B,C

{\tan ^2}\,\,\frac{A}{2} + {\tan ^2}\,\,\frac{B}{2} + {\tan ^2}\,\,\frac{C}{2}

A > 0,\,\;B > 0

A + B = \frac{\pi }{3}

\tan A\,\,\tan B