I'm in a hurry If f (x) is an odd function with a period of 5, and f (- 3) = 1, Tan @ = 2, then f (x) is an odd function with a period of 5（ 20sin@cos@ ）What is the value of? The monotone decreasing interval of function y = LG [radical 3-2sin (Π / 6 - 2x)] is?

I'm in a hurry If f (x) is an odd function with a period of 5, and f (- 3) = 1, Tan @ = 2, then f (x) is an odd function with a period of 5（ 20sin@cos@ ）What is the value of? The monotone decreasing interval of function y = LG [radical 3-2sin (Π / 6 - 2x)] is?

Tan @ = sin @ / cos @ = 2 sin @ squared + cos @ squared = 15cos @ squared = 1, so cos @ = root sign 1 / 5 = 5 / 5 root sign 5, so sin @ = 2 / 5 root sign 5, so sin@cos@= One in five 220sin@cos@=8 So f (8) = f (8-5) = f (3) = - f (- 3) = - 1. Because LG is greater than or equal to 1, it is an increasing function