JEE MATHEMATICS MCQ: INVERSE TRIGONOMETRY

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Application +4 | -1

{\left( {{{\sin }^{ - 1}}x} \right)^2} - {\left( {{{\cos }^{ - 1}}x} \right)^2} = a;0 < x < 1;a \ne 0

, then the value of

2{x^2} - 1

View answer and explanation

Correct option: B

\sin \left(\frac{2 a}{\pi}\right)

Option B (sin(2a/π)) is correct because using the identity sin^-1(x) + cos^-1(x) = π/2, the given equation can be simplified to express cos^-1(x) in terms of a, and then 2x² - 1 can be expressed as sin(2a/π).

More Questions from INVERSE TRIGONOMETRY

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The value of

\cos ^{-1}(\cos 12)-\sin ^{-1}(\sin 12)

is- The value of

\sin \left(2 \tan ^{-1}(1 / 3)\right)+

\cos \left(\tan ^{-1} 2 \sqrt{2}\right)

is Find

\cos ^ {-1}\left\{\frac{1}{\sqrt{2}}\left(\cos \frac{9 \pi}{10}-\sin \frac{9 \pi}{10}\right)\right\}=

\sin \left(\sin ^{-1} \frac{1}{5}+\cos ^{-1} x\right)=1

, then

x

is equal to If

{x^2} + {y^2} + {z^2} = {r^2},

then

{\tan ^{ - 1}}\left( {\frac{{xy}}{{zr}}} \right) + {\tan ^{ - 1}}\left( {\frac{{yz}}{{xr}}} \right) + {\tan ^{ - 1}}\left( {\frac{{xz}}{{yr}}} \right)\;

is equal to

2{\tan ^{ - 1}}\left( {\frac{1}{3}} \right) + {\tan ^{ - 1}}\left( {\frac{1}{7}} \right)

is equal to