Question

If sin yº = -and tan yº = 1, what is the value of cos y

Answer 1

The value of cos y° is -1

Explanation:

Given as Trigonometrical functions as :

sin y° = - 1

tan y° = 1

Let The value of cos y° = x

Now, As we know

tan
`\theta` =
`(sin \theta )/(cos \theta )`

So, tan y° =
`(sin y^(\circ))/(cos y^(\circ))`

∴ cos y° =
`(sin y^(\circ))/(tan y^(\circ))`

Or, x =
`(-1)/(1)`

i.e, x = - 1

So, The value of cos y° = x = -1

Hence, The value of cos y° is -1 Answer