kosmetykach

In a sentence

• Uczyłem się o różnych kosmetykach podczas kursu chemii.

  I was learning about various cosmetics during the chemistry course.

  Here, 'kosmetykach' is the locative plural form of 'kosmetyki', referring to discussing or learning about cosmetics in a context.

• Na półkach sklepowych był ogromny wybór w kosmetykach.

  There was a wide selection of cosmetics on the store shelves.

  In this sentence, 'kosmetykach' is used in the locative case to describe the variety present in cosmetics on shelves.

• Bardzo interesuję się składnikami w kosmetykach naturalnych.

  I am very interested in the ingredients in natural cosmetics.

  Here, 'kosmetykach' is in the locative case, focusing on the study or discussion about components in natural cosmetics.