Where do Sin, Cos and Tan Actually Come From - Origins of Trigonometry - Part 1

What is tan in terms of sin and cos?

Write cos(theta) in terms of sin(theta) if theta is acute

Write sin in terms of cos

Writing Trig Functions in Terms of Sine and Cosine

Sine (sin) and Cosec in terms of other ratios

Trigonometry : cos 3θ in terms of cos θ : ExamSolutions Maths Video Tutorials

Trigonometry For Beginners!

Identities in terms of sin or cos

Trick for doing trigonometry mentally!

Complex definitions of sine and cosine

cos(4x) in terms of cos(x)

cos(3x) in terms of cos(x)

Adding two trig identities in terms of sin and cos

Trigonometry : sin 3θ in terms of sin θ : ExamSolutions Maths Video Tutorials

Expressing sin(x) and cos(x) in terms of tan(x)

how to write sin(nθ) and cos(nθ) in terms of θ

Cos and Sec in terms of Other Ratios

Express sin(2θ) and cos(2θ) in terms of tan(θ)

Expressing sin(x) and cos(x) in terms of t = tan(x/2)