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1 solution
Moderator note:
Fantastic!
tan ( 1 0 0 ) + 4 × sin ( 1 0 0 ) = − cot ( 1 0 ) + 4 × cos ( 1 0 ) = − sin ( 1 0 ) cos ( 1 0 ) + 4 × cos ( 1 0 ) = sin ( 1 0 ) 4 × cos ( 1 0 ) × sin ( 1 0 ) − cos ( 1 0 ) = sin ( 1 0 ) 2 × sin ( 2 0 ) − cos ( 1 0 ) = sin ( 1 0 ) 2 × sin ( 2 0 ) − sin ( 8 0 ) = sin ( 1 0 ) sin ( 2 0 ) + sin ( 2 0 ) − sin ( 8 0 ) = sin ( 1 0 ) sin ( 2 0 ) − 2 ⋅ cos ( 5 0 ) sin ( 3 0 ) = sin ( 1 0 ) sin ( 2 0 ) − cos ( 5 0 ) = sin ( 1 0 ) sin ( 2 0 ) − sin ( 4 0 ) = sin ( 1 0 ) − 2 ⋅ cos ( 3 0 ) ⋅ sin ( 1 0 ) = − 3