5.6 Assignment
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MCR3U UNIT 5 – TRIG FUNCTIONS NAME: ASSIGNMENT #3 DATE:
Knowledge/Understanding Thinking/Inquiry Communication Application
-‐ /16 /5 /9 Note: 5 Communication marks will be given overall for the clarity of your answers including conciseness, organization, proper mathematical form and notation.
1. Solve 2tan22θ+ tan2θ−1=0 for 𝜃 to the nearest tenth of a degree for 00 ≤θ≤900 . [A:2]
2. Solve 6sin2θ−5sinθ+1=0for 𝜃 to the nearest degree for 00 ≤θ≤3600 . [A:3]
3. Prove the identity tanβsecβ−1+
tanβsecβ+1 =
2sinβcosβcos2β 1−cosβ( )
−4
2sinβcosβ . [A:4]
4. Angle 𝜃 is in standard position on a coordinate grid. The terminal arm of 𝜃 is in Quadrant II on the line
with equation 3y+2x =0 . Determine the measure of 𝜃. Include a diagram in your solution. [T/I:4]
5. If cscθ=− 898 , and 𝜃 is an angle in standard position, determine all possible values of 𝜃 for
−5400 ≤θ≤2700 [T/I:4]
6. Determine the number of triangles that could be drawn for ΔABC if ∠B=200 , c =5cm and b=2cm . Find the measures of the other angles and the other side of each possible triangle. Round to the nearest tenth, if necessary. [T/I:4]
7. What is the measure of the smaller angle between the hour hand and the minute hand of a 12-‐hour
clock at 8:50? What is the distance of the tips of the hands at 8:50 if the length of the hour and minute hands are 4 cm and 6 cm, respectively? [T/I:4]
* If you ONLY use the formula on Wikipedia, a mark of 0 will be given for question 7.