What are the 48 formulas of trigonometry?

These identities are derived from the Pythagorean theorem and involve the square of the trigonometric functions:

• sin2(θ)+cos2(θ)=1.
• 1+tan⁡2(𝜃)=sec⁡2(𝜃)1+tan2(θ)=sec2(θ)
• 1+cot⁡2(𝜃)=csc⁡2(𝜃)1+cot2(θ)=csc2(θ)