State the domain of the function. y=- 2x+5
1. [- 2,5]
2.[0,10]
3.[- 100,100]
4. all real numbers

Step-by-step explanation:

Cot is the inverse of tan.  Therefore, the ratios are also inverses.  The same goes for csc, which is the inverse of sin.  

The tan ∠B =  so the cot ∠B = so the first statement is false.

The sin ∠C =  so the csc ∠C = so the second statement is false.

The tan ∠C =  so the cot ∠C = so the third statement is false.

The sin ∠B =  so the csc ∠B = which reduces to so the last statement is true!