尝 起来 what effect does the 起来 have here on the 尝?

尝 起来
what effect does the 起来 have here on the 尝?

看起来 = it looks as if
尝起来 = it tastes as if
听起来 = it sounds as if

See “Expressing an initial judgement” – Direction complement "-qilai" - Chinese Grammar Wiki

Please do yourself a favor and buy & read a good Chinese grammar book!