A/c to trigonometric relations, sin(90 - x) = cos(x), that means sin(90 - x) = cos(x) = 1/3.
sin ( 9 0 ∘ − x ) = 3 1 ;
Using the trigonometric identity sin ( 9 0 ∘ − x ) = cos ( x ) , we find that sin ( 9 0 ∘ − x ) = 3 1 when cos ( x ) = 3 1 .
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