The value of sec - sin-1 sin 50-9 - cos-1cos 31-9 - is equal to

The correct option is B sec 9π Given, [ sin ^ 1 ( sin50π9 ) +cos ^ 1 ( cos31π9 ) ] = [ 50π9 + 31π9 ] =81π9 = 9π ...

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Differentiation of Inverse Trigonometric Functions

The value of ...

Question

The value of $s e c [s i n^{- 1} (s i n \frac{50 π}{9}) + c o s^{- 1} c o s (\frac{31 π}{9})]$ is equal to

s e c \frac{10 π}{9}

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s e c 9 π

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