## Description

20 questions. Involves precalculus and trigonometry, Please show work and circle the final answer if posslble to make it easier for me. Thank you so much.

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## Explanation & Answer

I finished (except for the question 10). I have no doubt I can solve it but please explain what the angles are (or upload the original picture).We still have enough time, so please ask what is unclear for you.

1. sin(𝑎 − 𝑏) = sin 𝑎 cos 𝑏 − sin 𝑏 cos 𝑎 , so

𝜋

7𝜋

7𝜋

𝜋

𝜋 7𝜋

𝜋

sin cos

− sin

cos

= sin ( − ) = sin (− ) = −1.

12

12

12

12

12 12

2

2. sin 𝜃 is given,

𝜋

2

< �...

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