Question

Answer me fast fast.
This photo is the question answer fast

Answer 1

Answer:

45° or 60°

Step-by-step explanation:

probably 45°

Answer 2

Answer:   45°

Step-by-step explanation:

    tan Ф = cotФ                                ∵0≤Ф≤90°

or, tanФ  = 1/tanФ                             ∴ tan Ф = 1

or, tan²Ф =  1                                      or, tanФ = tan 45°

or, tanФ  = ±1                                      or, Ф     =  45°