If tan x°= z/10 and cos x°= 10/y , what is the value of sin x°? A. sin x° = z/y
B. sin x° = y/z
C. sin x° = 10z
D. sin x° = 10y

A. z/y

Step-by-step explanation:

Because the trig ratios are; tangent : opp/adj cos : adj/hyp sin : opp/hyp

because tan of x is z/10, z must be opposite

and because cos of x is 10/y, then y must be the hypotenuse

this means sin of x must be z/y

a line is an defined derm because it

a)contains an infinite number of points b) can be used to create other geometric shapes c)describes something that does not have width or depth d) is a term that does not have a formal definition. a line is an undefined term because it: contains an infinite number of points.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15