in this question how did sin-1v appear?shouldn't it  be cos-1v?(Underlined part)
in this question how did sin-1v appear?shouldn't it  be cos-1v?(Underlined part) lfu=sü-t x), prate that — SOL.CTTON We have, u (m ccs¯ x) x) sin¯ u —m cs- x and as - x sin¯ u •sin¯ v =m(cos¯ x + sin¯ x) Ehfferentiatirtg both sides with respect to v, we chtain

Dear student
Yes you are right is should be cos-1v
Regards

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