Question

True or false (Picture provided)

Answer 1

Hello!

The answer is: True.

Why?

A counterexample is a way that we can prove that something is not true about a mathematical expression or equation, it could be considered as an exception to a rule, so to check if the answer is true or false, we must prove that a counterexample of the given expression is 0°, so:

The given expression is:

`sinytany=cosy`

Then,

`sin(0)*(sin(0))/(cos(0))=cos(0)\\\\0*(0)/(1)=1\\\\0*0=1\\0=1`

We can see that the equation is not fulfilled, so 0° is a counterexample of
`sinytany=cosy` and the answer is true.

Have a nice day!