29 . B
Look for “(sin^2 + cos^2 )” in the expression:
30 . A
Sketch a diagram:
The net change is south 20 and west 60:
So you’re looking for the hypotenuse of a right triangle with legs of 20
and 60:
Look for “(sin^2 + cos^2 )” in the expression:
Sketch a diagram:
The net change is south 20 and west 60:
So you’re looking for the hypotenuse of a right triangle with legs of 20
and 60: