Evaluate <math><mstyle displaystyle="true"><mi>sin</mi><mrow><mo>(</mo><mn>20</mn><mo>)</mo></mrow></mstyle></math> .

Evaluate <math><mstyle displaystyle="true"><mi>cos</mi><mrow><mo>(</mo><mn>80</mn><mo>)</mo></mrow></mstyle></math> .

Multiply <math><mstyle displaystyle="true"><mn>0.34202014</mn></mstyle></math> by <math><mstyle displaystyle="true"><mn>0.17364817</mn></mstyle></math> .

Evaluate <math><mstyle displaystyle="true"><mi>cos</mi><mrow><mo>(</mo><mn>20</mn><mo>)</mo></mrow></mstyle></math> .

Evaluate <math><mstyle displaystyle="true"><mi>sin</mi><mrow><mo>(</mo><mn>80</mn><mo>)</mo></mrow></mstyle></math> .

Multiply <math><mstyle displaystyle="true"><mn>0.93969262</mn></mstyle></math> by <math><mstyle displaystyle="true"><mn>0.98480775</mn></mstyle></math> .

Add <math><mstyle displaystyle="true"><mn>0.05939117</mn></mstyle></math> and <math><mstyle displaystyle="true"><mn>0.92541657</mn></mstyle></math> .

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