यदि $a=\sin ^{-1}(\sin (5))$ और $b=\cos ^{-1}(\cos (5))$ है,तो $a^2+b^2$ का मान ज्ञात कीजिए।

  • A
    $4 \pi^2+25$
  • B
    $8 \pi^2-40 \pi+50$
  • C
    $4 \pi^2-20 \pi+50$
  • D
    $25$

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