Answer:
cos(θ) = -3/5
Step-by-step explanation:
The cosine of the reference angle (in the first quadrant) is ...
cos(θ) = √(1 -sin(θ)²) = √(1 -(4/5)²) = √(1 -16/25) = √((25-16)/25)
= √(9/25) = 3/5 . . . . in the first quadrant
In the second quadrant, the cosine is negative, so the answer is ...
cos(θ) = -3/5
To convert a decimal to a percentage, you move the decimal place two spaces to the right.
2.5 would become 250%.
I hope this helps!
Answer:
26 rows
Step-by-step explanation
Since each row as 8 chairs and they can add 3 chairs to each row,
the rows can now have 11 chairs in them.
they needed 5x as many chairs as 8x7. this equals 280 chairs (8x7=56--> 56x 5 = 280) 280 divided by 11 chairs per row is 25.48 which is 26 rows with some empty chairs left over, therefore your answer is 26 rows.
Answer:
i only do calcus, sorry
Step-by-step explanation:
