Is angrily an adverb or an adjective?

Angrily is an adverb. The easy way to tell is to ask if angrily describes a verb or a noun. For example, in "Angrily Joseph juggled for the disrespectful audience." 'angrily' describes Joseph's juggling, not Joseph. You can angrily stomp, angrily swear, angrily knock, angrily tell, and angrily defenestrate, but you cannot angrily Joseph, angrily beaver, or angrily window.