Unit Circle
#8. Find the exact value.
3pi/2
#41 find x. Round to three decimals.
x= 11.876
What is the Law of Sines?
Sin A/a= Sin B/b= Sin C/c
What is the Law of Cosines?
a2=b2+c2-2bc Cos A
What does amplitude measure?
The distance from the midline to the maximum. It's the leading coefficient on sin or cos.
What is the reference angle for 390 degrees?
30 degrees
#43 find w. Round to three decimals.
w= 4.728
#42 find BC. Round to three decimals.
BC= 3.019
#46 Find AC. Round to three decimals.
AC= 49.006
What is the midline?
The line going through the middle of sine or cosine. Where the string would be. Represented as y= some number
#13. Find the exact value.
sqroot 2/2
#53 find theta. Round to three decimals.
theta= 75.522 degrees
What is the midline of y= 3 cos x + 5
y=5. The line going through the middle of the graph (where the string would be).
#14. Find the exact value.
1/sqroot 3 which simplifies to sqroot 3/3
#56 find theta. Round to 3 decimals.
theta= 31.430 degrees
What is the amplitude of y= 2 sin x +6
2. The distance from the midline to the max.
#20. Find the exact value.
negative 1/sqroot3 which simplifies to negative sqroot 3/3
What 3 things must happen for us to celebrate the day before spring break?
Win the computer quiz, attendance goal, tardy goal
What is your plan to do well on the quiz tomorrow?
???
What is your personal goal for tomorrows computer quiz?
Students choice
What is the difference between the starting points of sine and cosine?
Sine starts from (0,0) while Cosine starts at (0,1)