Asked by anonymous
1. The sine of twice an angle is square root (2)/2. If the angle is between 0 and 2pie, what are its possible values?
2. The radius of a circle is increased by 20%. What is the percent increase in area?
2. The radius of a circle is increased by 20%. What is the percent increase in area?
Answers
Answered by
drwls
The angles with a sine of (sqrt 2)/2 is 45 degrees or 135 degrees, or 360 degrees plus those angles (405 deg; 495 deg.). Your unknown angles are half of thuse angles.
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