Find sin θ if cot θ = - 4 and cos θ < 0.
a) - 17
b) sqrt 17 / 17
c)-1/4
d) sqrt 17 / 4

The correct option is B

Step-by-step explanation:

The correct option is B.

Solution:

We have given that

cot θ = - 4

cos θ < 0

This shows that both the ratios are negative. So they lie in second quadrant because both are negative.

cot θ = - 4  it means that tan θ = -1/4 which shows that two sides opposite = 1 and adjacent = -4

Now we could find hypotenuse by Pythagorean theorem:

Hypotenuse = √(1)²+(-4)² = √1+16

=√17

Sin θ  = perpendicular(opposite)/hypotenuse

Sin θ =1/√17

Now multiply and divide by √17

Sin θ=  1/√17*√17/√17

Sin θ = √17/17

Thus the correct option is B

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40