SOLUTION
Step 1 :
In this question, we are meant to use the calculator to check if the sine of the angle is correct.
Step 2 :
Using the complimentary property of sine and cosine, we have the following equations:
[tex]\sin \text{ }\theta\text{ = cos ( 90 - }\theta\text{ )}[/tex][tex]\sin \text{ ( 57 ) = cos ( 90 - 57 ) = cos ( 33)}[/tex]
CONCLUSION:
[tex]\sin \text{ ( 57 ) = cos ( 33 )}[/tex]
