##### Notes

This printable supports Common Core Math Standard HSG-SRT.C.7

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# Special Relationships Between Sine and Cosine (Grades 11-12)

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## Special Relationships Between Sine and Cosine

Instructions: For each question, find the value of $x$.

1.
$cos(30°)=sin(x)$ (assuming $0°<= x <= 90°$)
1. 30°
2. 15°
3. 60°
4. 90°
2.
$sin(15°)=cos(x)$ (assuming $0°<= x <= 90°$)
1. 45°
2. 75°
3. 60°
4. 30°
3.
$sin(85°)=cos(x)$ (assuming $0°<= x <= 90°$)
1. 15°
2. 105°
3. 85°
4.
$sin(34°)+ cos (90°)=sin(x)$ (assuming $0°<= x <= 90°$)
1. 10°
2. 56°
3. 124°
4. 34°
5.
$sin(45°)- cos (45°)=cos(x)$ (assuming $0°<=x<=90°$)
1. 90°
2. 45°
3. 22.5°        You need to be a HelpTeaching.com member to access free printables.