<h3>4cos ^4(x) -5cos^2(x)+1=0</h3><h3>(u^-1) (4u^-1)=0</h3><h3>(u^-1)=0</h3><h3>u^=1</h3><h3>u=√1</h3><h3>u=1</h3><h3>u=±1</h3><h3>cos (x)=±1</h3><h3>x=0 or π</h3><h3 /><h3>4u^-1=0</h3><h3>4u^=1</h3><h3>u^=1/4</h3><h3>u=√1/4</h3><h3>u=1/2</h3><h3>u= ±1/2</h3><h3>cos (x)=±1/2</h3><h3>x= π/3 or 4π/3</h3><h3 /><h3>x= 0, π/3, π, 4π/3</h3>
Answer:
Part 1)
Part 2)
Part 3)
Step-by-step explanation:
Part 1) Determine the value of x
we know that
------> by corresponding angles
Solve for x
Multiply by 5 both sides to remove the fraction
Divide by 4 both sides
Part 2) Determine the value of z
we know that
------> by corresponding angles
we have
substitute the value of x and solve for z
Part 3) Determine the value of y
we know that
------> by supplementary angles
we have
substitute and solve for y
Not sure what that means
I guess it must be
-8x^2 + 3xy + (-9x) + (-3)
and
2ab + (-5ab^2) + (-9a^2b)
Answer: 300
Step-by-step explanation:
Let the total number of people surveyed be represented by x.
Since we are informed that the probability of a customer ordering chicken is 1/4 and 75 people said they prefer to order chicken. This will then be:
1/4 of x = 75
1/4 × x = 75
x = 75 × 4
= 300
Therefore, 300 people were surveyed