<PRE><B>Question 93988</B>
please help me Indicate whether the problem is true or false show how you got it sin25 degrees = sin155 degrees
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sin(25 degrees) = sin(180-25 degrees) = sin(155 degrees)
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You can see this if you know something about the unit circle.
Draw the terminal side of a 25 degree angle; the y value where the line meets the unit circle  is the sine.
Draw the terminal side of a 155 degree angle; the y value whee the line meets the unit circle is the sine.
You should be able to see that they are the same y value.
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Cheers,
Stan H.</PRE>