Both of these verbs are used for asking about something or looking for information. The nouns for the request / investigation are enquiry and inquiry.
Technically, enquire is used for "ask" in general ("He enquired about prices for the products"), and inquire for a more formal investigation ("The police will make an inquiry into the alleged corruption.")
However, in American English it is now very common to use inquire for everything: "He inquired about prices for the products."
Gavin Rossdale a yoga fan is seen here clutching a yoga mat where he is most probably returning or attending yoga classes. Born in London 1965 the 48 year old lead singer and guitarist of rock group Bush swears by a strict fitness regimen involving various yogic postures and asanas. Rossdale has been attending Bikram yoga classes which require yoga exercises to be done in a sweltering hot room. Of course you sweat a lot but end up feeling lighter and healthier. Made famous by famous yoga teacher Bikram Choudhury, it is a branch of hatha yoga and followed by many celebrities.