Is there a similar formula for 1 / cos & # 178; X = sec & # 178; X?

Is there a similar formula for 1 / cos & # 178; X = sec & # 178; X?

There are many of them. I collected some on the Internet and sent them to you for reference
Basic relations of trigonometric functions with the same angle
Reciprocal relation: Tan α · cot α = 1 sin α · CSC α = 1 cos α · sec α = 1
The relation of quotient: sin α / cos α = Tan α = sec α / CSC α cos α / sin α = cot α = CSC α / sec α
Square relation: sin ^ 2 (α) + cos ^ 2 (α) = 1 1 + Tan ^ 2 (α) = sec ^ 2 (α) 1 + cot ^ 2 (α) = CSC ^ 2 (α)
Two commonly used formulas for different conditions
　　sin^2(α)+cos^2(α)=1 　　tan α *cot α=1
A special formula
　　（sina+sinθ）*（sina-sinθ）=sin（a+θ）*sin（a-θ）