What do we use sin(x), cos(x) and tan(x) for?

Differentiating sin(x), cos(x) and tan(x)

Trigonometry For Beginners!

Establishing the Derivatives of sin x, cos x & tan x

Differentiating tan x, cos x and sin x - AS and A Level

Prove tan x cos x = sin x

Simplify the expression (sec x - cos x) / tan x

Derivatives of sin x, cos x, tan x, e^x and ln x

If tan[theta/2]=√1−e/1+e tan[phi/2] then prove that cosϕ=costheta−e/1−ecodtheta

Proof of the Derivatives of sin x, cos x and tan x

Mastering Derivatives: sin(x), cos(x), and tan(x) Differentiation

Calculus 3: Limits of Trigonometric Functions sin x, cos x, tan x

Proof why tan(x) = sin(x)/cos(x)

Verify sec x - cos x = sin x tan x

Limits of sin(x), cos(x) and tan(x)

Aレベル数学：E1-01 [三角法：sin(x)、cos(x)、tan(x)の紹介]

Graphing Trigonometric Functions sin x, cos x and tan x

Integral of tan(x)/cos(x) (substitution)

AP Calculus - Trigonometry Review - tan x = sin x / cos x

prove tan x sin x + cos x = sec x