Prove that : sin^4(2x)=3/8-1/2cos4x+1/8cos8x Someone plzz help!!!
1 answer:
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Answer:
A) 45
B) 80
C) 50
Step-by-step explanation:
When the terminal side is in the first quadrant (angles from 0° to 90°), our reference angle is the same as our given angle. This makes sense, since all the angles in the first quadrant are less than 90°.
When the terminal side is in the second quadrant (angles from 90° to 180°), our reference angle is 180° minus our given angle.
When the terminal side is in the third quadrant (angles from 180° to 270°), our reference angle is our given angle minus 180°.
When the terminal side is in the fourth quadrant (angles from 270° to 360°), our reference angle is 360° minus our given angle.
Answer:
The vector AB is represented by (11, 2).
Step-by-step explanation:
Given two points on the same plane, we can determine the vector by this formula:
(1)
Where:
- Coordinates of point A.
- Coordinates of point B.
If we know that and
, then the vector AB is:
The vector AB is represented by (11, 2).