Given the following unit circle, rotate green dot to the appropriate angle and then find the exact value of the function.sine, 180, degreessin180 ∘
Question
Given the following unit circle, rotate green dot to the appropriate angle and then find the exact value of the function.sine, 180, degreessin180 ∘
Solution
The sine of 180 degrees is 0.
Here's why:
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The unit circle is a circle with a radius of 1 centered at the origin (0,0) in the coordinate plane.
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When we talk about angles in the unit circle, we usually start at the positive x-axis (the right side of the x-axis) and rotate counterclockwise. An angle of 180 degrees would bring us to the negative x-axis (the left side of the x-axis).
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The sine of an angle in the unit circle is the y-coordinate of the point where the terminal side of the angle intersects the circle.
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For an angle of 180 degrees, this point is (-1,0).
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Therefore, the sine of 180 degrees is 0.
Similar Questions
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In this program we are going to practice using the Math class by computing some important values on the unit circle. Using the angles 0, PI/2, and PI, print out the angle, the cosine of the angle, and the sine of the angle.Your output should look like this:Radians: (cos, sin)0.0: 1.0, 0.01.5707963267948966: 0.0, 1.03.141592653589793: -1.0, 0.0Hints:You’ll need to use the Math.sin, Math.cos methodsand the Math.PI constant!You can round a decimal to 2 decimal places by multiplying by 100, rounding to the nearest int using Math.round, and then dividing by 100. You will need to round the sine and cosine values. Here’s an example:double angle = Math.PI/4;double cosine = Math.cos(angle); // 0.707106781cosine = cosine * 100; // 70.7106781cosine = Math.round(cosine); // 71.0cosine = cosine / 100.0; // 0.71// Or put it all on one line:cosine = Math.round(cosine * 100) / 100.0;Some Math BackgroundThe Java methods need the angles to be in radians, rather than degrees. PI/2 radians is equal to 90 degrees. PI radians is equal to 180 degrees.That’s why we’re using multiples of PI in this exercise.
Give the exact value of sin(𝜋2)
Find the terminal point on the unit circle determined by π6 radians.Use exact values, not decimal approximations.
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