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Why does tan equal to sin/cos? - Socratic
Proving Identities - Trigonometry - Socratic
Fundamental Identities - Trigonometry - Socratic
What is #tan(45)#, #sin(45)# and #cos(45)#? - Socratic
Double Angle Identities - Trigonometry - Socratic
Special Limits Involving sin(x), x, and tan(x) - Calculus - Socratic
How do you simplify #cos(arctan(x)) - Socratic
Half-Angle Identities - Trigonometry - Socratic
Is sine, cosine, tangent functions odd or even? | Socratic
Prove that # cos A / (1- tan A) + sin A / (1- cot A) -= cos A - Socratic