Question

A counterexample for the expression sin y tan y= cos y is 0.

Answer 1

Answer:true

Explanation:

edge

Answer 2

True

Explanation:

To answer this question we must evaluate

y = 0° on both sides of the equation.

For the left side we have:

`sin(0\°) tan(0\°)`

We know that
`tan(0\°) =(sin(0\°))/(cos(0\°))`

We know that
`cos(0\°) = 1` and
`sin(0\°) = 0`.

Therefore
`tan(0\°) = 0`.

Then the left-hand side of the equals is equal to zero.

On the right side we have:

`cos(y)`

When evaluating
`cos(y)` at
`y = 0`

We have to
`cos(0\°) = 1`.

0 ≠ 1

The equation is not satisfied. Therefore y = 0 ° is a counterexample to the equation