Find the value of cot A given sec A =13/13 and csc A<0 find answer as a decimal, not fractions

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Suppose that the function f is defined. , for all real numbers, as follows. _ \ 1/4x² -4 if x≠ -2 f(x)=< /_-1 if x=-2 find f(-5), f(-2), and f(4)