Which identity needs to be used to prove tan (pi/2 - x) = cot x

The answer is  tanФ = sinФ/cosФ ⇒ the second answer

Step-by-step explanation:

∵ tanx = sinx/cosx , ∵ cotx = cosx/sinx

∵ tan(π/2 - x) =

∵ sin(π/2 - x) = cosx ⇒ complementary angles (sum of them = π/2)

∵ cos(π/2 - x) = sinx

∴ tan(π/2 - x) = = cotx

∴ The identity is tanФ = sinФ/cosФ

choice b is correct

step-by-step explanation:

we have been given the following system of inequalities;

we are required to graph the solution to the system of inequalities. using a graphing tool, the graph of the system is as shown in the attachment. the continuous line represents the graph of while the dotted line represents .

c. (3,2,6) is the answer.