Trigonometric Functions, Please help urgent

[NOname777]

 

[Harry_the_cat]

Do you know what "a" tells you about the graph?
Do you know what the amplitude of the graph is?
Do you know what the period is?

 

[JeffM]

First, you need to read https://www.freemathhelp.com/forum/threads/guidelines-summary.112086/#post-433156

You managed to avoid quite a few of the forum’s guidelines in a single post.

[MATH]cos(y) \ge \text {WHAT NUMBER?}[/MATH]
So what is a equal to?

 

[Oiler]

You are told the numerical coordinates of the minimum point,
this gives you two pieces of information
1.) when the x co-ord of the minimum point is input into the derivative of the curve's function, it maps to a 0 [by definition]
2.)when the x co-ord of the minimum point is input into the function it outputs a -6.
How can you use this information to reach the goal of determining the values of a and k

 

[Steven G]

You are told the numerical coordinates of the minimum point,
this gives you two pieces of information
1.) when the x co-ord of the minimum point is input into the derivative of the curve's function, it maps to a 0 [by definition]
2.)when the x co-ord of the minimum point is input into the function it outputs a -6.
How can you use this information to reach the goal of determining the values of a and k

This post is under Algebra so we should assume that the OP does not know any calculus.

 

[Oiler]

This post is under Algebra so we should assume that the OP does not know any calculus.

The OP doing is a question
the where the phrase is used "local minimum point" i think not a pre calculus student can
find this useful
hence, OP knows calculus
Q.E.D

 

[Steven G]

The OP doing is a question
the where the phrase is used "local minimum point" i think not a pre calculus student can
find this useful
hence, OP knows calculus
Q.E.D

The given min helps you find a as well as the period. That is all you need to find a and k