sin^-1 cos (sin^-1 x)=180/3
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sin^-1cos(sin^-1x)= 60
cos(sin^x-1) = sin60
cos(sin^x-1) = √3/2
cos(sin^x-1) = cos30
sin^x-1 = 30
x = sin30
x = 1/2
cos(sin^x-1) = sin60
cos(sin^x-1) = √3/2
cos(sin^x-1) = cos30
sin^x-1 = 30
x = sin30
x = 1/2
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