Answer
1) TanФ = 5/12
2) CosФ = 12/13
Explanation
SecФ = 1/CosФ
Cos = adjacent/hypotenuse
SecФ= 13/12
cosФ = 12/13
This means that the adjacent is 12 and hypotenuse is 13.
Opposite = √(13²-12²)
= √25
= 5
Tangent = opposite/adjacent
TanФ = 5/12
Sine = opposite/hypotenuse
SinФ = 5/13
