Answer:
tan 45°=1
B is correct.
Step-by-step explanation:
In given right angle triangle.
Two angles are equal.
Using trignometry identity.
For right triangle
[tex]\tan\theta=\dfrac{P}{B}[/tex]
For given triangle P=B=1
Ф=45°
Substitute into formula
[tex]\tan45^\circ=\dfrac{1}{1}[/tex]
[tex]\tan45^\circ=1[/tex]
Hence, The value of tan 45°=1
