Formulas that could be put everywhere

https://byjus.com/sin-cos-formulas/

https://chatgpt.com/share/67933f3d-546c-800a-85fa-6cd75a3d4fb8

اَشْهَدُ اَنْ لَّآ اِلٰهَ اِلَّا اللهُ وَحْدَہٗ لَاشَرِيْكَ لَہٗ وَاَشْهَدُ اَنَّ مُحَمَّدًا عَبْدُهٗ وَرَسُولُہٗ

• sin²θ + cos²θ = 1.
• tan²θ + 1 = sec²θ
• cot²θ + 1 = cosec²θ
• sin 2θ = 2 sin θ cos θ
• cos 2θ = cos²θ – sin²θ
• tan 2θ = 2 tan θ / (1 – tan²θ)
• cot 2θ = (cot²θ – 1) / 2 cot θ