Question

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

Answer 1

Answer:

The value of cos y° is -1

Step-by-step explanation:

Given as Trigonometrical functions as :

sin y° = - 1

tan y° = 1

Let The value of cos y° = x

Now, As we know

tan $\theta$ = $\dfrac{sin \theta }{cos \theta }$

So, tan y° = $\dfrac{sin y^{\circ}}{cos y^{\circ}}$

∴ cos y° =  $\dfrac{sin y^{\circ}}{tan y^{\circ}}$

Or,  x = $\dfrac{-1}{1}$

i.e, x = - 1

So, The value of cos y° = x = -1

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