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 [tex]\theta[/tex] = [tex]\dfrac{sin \theta }{cos \theta }[/tex]
So, tan y° = [tex]\dfrac{sin y^{\circ}}{cos y^{\circ}}[/tex]
∴ cos y° = [tex]\dfrac{sin y^{\circ}}{tan y^{\circ}}[/tex]
Or, x = [tex]\dfrac{-1}{1}[/tex]
i.e, x = - 1
So, The value of cos y° = x = -1
Hence, The value of cos y° is -1 Answer
