For which acute angle are the sine of the angle and cosine of the angle equal?

a: 30
b: 45
c: 60
d: 75

Kilgore trout creates a new scale to diagnose depression. however, his scale only assesses one symptom of depression while ignoring others. which of the following is his new scale most likely lacking? a) test-retest reliability b) discriminant validity c) criterion validity d) alternate-forms reliability e) content validity f) none of the above