MATH 150 EXAM 3 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question 1.
sin(2u) =
ANSWER
2sin(u)cos(u)
Question 2.
sin(pi/2 - @)
ANSWER
Question 3.
tan?(u)
ANSWER
= 1-cos(2u)/1+cos(2u)
Question 4.
tan(u/2)
ANSWER
= (1-cos(u))/sin(u)
= sin(u)/(1 +cos(u))
Question 5.
cos*(u)
ANSWER
= 1+cos(2u)/2
1/6
, Question 6.
sin(u)cos(v)
ANSWER
1/2[sin(u+v) + sin(u-v)]
Question 7.
tan(2u)
ANSWER
2tan(u)/1-tan2(u)
Question 8.
cot(pi/2 - @)
ANSWER
Question 9.
ANSWER
Question 10.
ANSWER
Question 11.
cos(u/2)
ANSWER
= +/(1+cos(u))/2
2/6
CORRECT ANSWERS
Question 1.
sin(2u) =
ANSWER
2sin(u)cos(u)
Question 2.
sin(pi/2 - @)
ANSWER
Question 3.
tan?(u)
ANSWER
= 1-cos(2u)/1+cos(2u)
Question 4.
tan(u/2)
ANSWER
= (1-cos(u))/sin(u)
= sin(u)/(1 +cos(u))
Question 5.
cos*(u)
ANSWER
= 1+cos(2u)/2
1/6
, Question 6.
sin(u)cos(v)
ANSWER
1/2[sin(u+v) + sin(u-v)]
Question 7.
tan(2u)
ANSWER
2tan(u)/1-tan2(u)
Question 8.
cot(pi/2 - @)
ANSWER
Question 9.
ANSWER
Question 10.
ANSWER
Question 11.
cos(u/2)
ANSWER
= +/(1+cos(u))/2
2/6