The seesaw moves and the angle created by the left side of the seating board and the central support is now 80 degrees. Create a
2 answers:
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Answer:
Step-by-step explanation:
We know
in the third quadrant
We use a scientific calculator to find the inverse cosine of -0.9041 to find
Since this angle is not in the required quadrant we must find the other angle who has the same cosine. The required angle is equidistant from the found value from the 180 degrees angle, so our solution is
