find the value of this
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Refer the above pic....
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Answer:
tan
−1 (1)+cos −1 (− 2 )+sin −1 (− 2 1 )
⇒tan −1 (tan 4 π )+cos −1 (cos 3 2π )+sin −1 (sin 6 7π )
⇒ π /4 + 2π /3+ 7π/6
⇒ 3π+8π+14π
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12
⇒ 12 /25π
u said u will type
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