Surface Area of Composite Figure

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.

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

How many grams the dog will eat in 3 days?