For 180°<0<270° which of the primary trigonometric functions may have negative values?

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

Which of the following represents a function? 50 !

Without any equipment, you can see stars that are 2{,}800{,}0002,800,0002, comma, 800, comma, 000 light-years away. by looking through a small telescope, you can see stars that are 3{,}112{,}000{,}0003,112,000,0003, comma, 112, comma, 000, comma, 000 light-years away. approximately how many times as far can you see using a small telescope as without any equipment?