Hello Samuthira
Please check https://www.teachoo.com/3093/679/Misc-12---Chapter-2-Inverse-Trigonometry---Prove-9pi-8---9-4/category/Miscellaneous/
Written on March 20, 2018, 1:38 p.m.
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Answer of this question
9π/3-9/4sin^-1 1/3
Davneet Singh
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