Math 1650 Section 622
Exam number 3
Show all work. How you get your answer is just
as important, if not more important, than the
answer itself. If you think it, write it!
Find the following values (5 pts. each):
( Hint: [(p)/12] = [1/2]([(p)/6]) )
Verify the following trigonometric identity (15 pts.):
sec4 x-tan4 x = 2sec2 x-1
(20pts.) Find the solutions (in [0,2p]) of the equation
3cotx + 2sinx = 0
Use trigonometric identities to write
f(x) = (sinx+cosx)2
as a stretched, translated trig function, and sketch a graph of it. (20 pts.)
in terms of sinx and cosx. (15 pts.)
File translated from TEX by TTH, version 0.9.