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in Trigonometry by (25 points)

the greatest and the least value of (sin-1x)3 + (cos-1x)3

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1 Answer

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For minimum value, put sin −1 x= π/4 ​ (to make the square term zero)

Similarly for maximum value we put sin −1 x=−π/2 ​ (to make the square term maximum)

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