Answer:
https://youtu.be/cqF6M25kqq4
Step-by-step explanation:
Realize the tangent function has a period of 180°, so when your calculator (or memory) tells you
.. θ = arctan(-1)
.. θ = -45°
you can translate that value into the desired range by adding multiples of 180° to get the two solutions ...
.. θ = 135°
.. θ = 315°
16 because 5 times 4 = 20 there for you multiply 4 times 4 to get 16
It is 7 opposite is different and absolute value would be 7 also it is always positive