7 8 [don't google it, don't ask other, just think, draw a picture, and make your best guess, come on. live a little...] 1 A -da x B A is finite. B [sin(z) cos(x)dz C C D A) False D E E F A) possibly: use a u-sub u: F G B) True G H H I SELECT ALL APPLICABLE CHOICES C) possibly: use a trig identity for sin(2x) E) possibly: use euler identities: sin(x) = F) integrate each separately resulting in f sin dx fcos xdx G) possibly: a u-substitution, u = sin x H) none of these I = tan (2) B) possibly: a u-substitution, u = cos x SELECT ALL APPLICABLE CHOICES D) possibly: use a trig identity for product to sums (eix - e-ix) and cos(x) = (eix + e-ir)