tan xdegree = tan (90 x)degree when
A. x = 0
B. x = -30
C. x = -45
D. x = -60
E. x = -90
answer is C why???
A. x = 0
B. x = -30
C. x = -45
D. x = -60
E. x = -90
answer is C why???
a) tan0 [0] vs tan 90 [1/0]
b) tan(-30) [-1/rad3] vs tan(120) [-rad3/1]
c) tan(-45) [-1] vs tan(135) [-1]
The key is to know your triangles about your unit circle. Knowing the ASTC pnemonic (All Students Take Calculus) helps with getting the angle and signs right as well.
b) tan(-30) [-1/rad3] vs tan(120) [-rad3/1]
c) tan(-45) [-1] vs tan(135) [-1]
The key is to know your triangles about your unit circle. Knowing the ASTC pnemonic (All Students Take Calculus) helps with getting the angle and signs right as well.