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

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 =

So, tan y° =

∴ cos y° =  

Or,  x =

i.e, x = - 1

So, The value of cos y° = x = -1

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

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step-by-step explanation:

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solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system