Question

HELPP ME PLZ IM VERY CONFUSED

For what value(s) of x does sin(x) = 1?

-90°

270°

all of the above

none of the above

2 points
Question 66

The y-value of y = sin(x) when x= -360° is y = 0.

True

False

2 points
Question 67

The y-value for y = cos(x) when x = -90° is 0.

True

False

2 points
Question 68

For what value(s) of x does cos(x) = -1?

-360°

360°

all of the above

none of the above

2 points
Question 69

The y-value of y = tan(x) when x = -90° and x = 90° is 0.

True

False

2 points
Question 70

What is the y-value for y = tan(90°)?


- negative one-half


one-half

1

undefined

Answer 1

1st answer none of the above. these are the same angle and have sin of -1

#66 true -360° is the same as+360° and sin here is 0

67. true

68 neither. cos is -1 at 180 and -180

69 false, tan is undefined there

70 undefined