How to find A?

enter image source here

1 Answer
Jim G.
Mar 7, 2018

#"see explanation"#

Explanation:

#"the basic standard form of the cosine function is"#

#•color(white)(x)y=acos(bx)#

#"where amplitude "=|a|," period "=(2pi)/b#

#f(t)=Acos(nt)#

#"has amplitude "=3rArrA=3#

#"period "=5rArr(2pi)/n=5rArrn=(2pi)/5#

Related questions
Impact of this question
482 views around the world
You can reuse this answer
Creative Commons License