Some input devices include a kind of output that provides the user with a physical response from the device. what kind of output is this

What is one reason why indoor air pollution has become an increasing problem.

Lucas put a lot of thought into the design for his company's new white paper. he made sure to include repeating design elements such as color schemes and decorative images. his goal was to a.add symmetry b.create a unified publication c.provide consistency d.save money

Verify each identity[tex] \frac{csc}{cot \: x \: + \: tan \: x} = cos \: x[/tex]