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QR Challenge: Double, Half, Sum and Difference, and PtoS

Created using the ClassTools QR Treasure Hunt Generator

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Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

3. Print out the QR codes.

4. Cut them out and place them around your class / school.

B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

Questions / Answers (teacher reference)

Question

Answer

1. If cosx = -2/3 and x is in quadrant II, find cos 2x, sin 2x, and tan 2x1
2. If sinx = 3/5 and x is in quadrant I, find cos 2x, sin 2x, and tan 2x1
3. Find the exact value of sin 22.51
4. Express sin3xsin5x as a sum of trig functions1
5. Compute sin15cos151
6. Write sin7x +sin3x as a product1
7. Write cos11x + cos5x as a product1
8. If cosx = -6/11 and x is in quadrant II, find sin 2x, cos 2x, and tan 2x1
9. Write the product as a sum: cos3xcos7x1

 


Double, Half, Sum and Difference, and PtoS: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_cosx_=_-2/3_and_x_is_in_quadrant_II,_find_ cos_2x,_sin_2x,_and_tan_2x

Question 1 (of 9)

 


Double, Half, Sum and Difference, and PtoS: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_sinx_=_3/5_and_x_is_in_quadrant_I,_find_ cos_2x,_sin_2x,_and_tan_2x

Question 2 (of 9)

 


Double, Half, Sum and Difference, and PtoS: QR Challenge

https://www.classtools.net/QR/decode.php?text=Find_the_exact_value_of_sin_22.5

Question 3 (of 9)

 


Double, Half, Sum and Difference, and PtoS: QR Challenge

https://www.classtools.net/QR/decode.php?text=Express_sin3xsin5x_as_a_sum_of_trig_functions

Question 4 (of 9)

 


Double, Half, Sum and Difference, and PtoS: QR Challenge

https://www.classtools.net/QR/decode.php?text=Compute_sin15cos15

Question 5 (of 9)

 


Double, Half, Sum and Difference, and PtoS: QR Challenge

https://www.classtools.net/QR/decode.php?text=Write_sin7x_+sin3x_as_a_product

Question 6 (of 9)

 


Double, Half, Sum and Difference, and PtoS: QR Challenge

https://www.classtools.net/QR/decode.php?text=Write_cos11x_+_cos5x_as_a_product

Question 7 (of 9)

 


Double, Half, Sum and Difference, and PtoS: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_cosx_=_-6/11_and_x_is_in_quadrant_II,_find_sin_2x,_cos_2x,_and_tan_2x

Question 8 (of 9)

 


Double, Half, Sum and Difference, and PtoS: QR Challenge

https://www.classtools.net/QR/decode.php?text=Write_the_product_as_a_sum:__cos3xcos7x

Question 9 (of 9)