Easily calculate the sine, cosine, or tangent of a double angle (2θ) with our user-friendly online calculator. Input your angle in degrees or radians and get instant, accurate results for sin(2θ), cos(2θ), and tan(2θ). Ideal for students, engineers, and anyone working with trigonometric identities.
Formula:
The Double Angle Formulas are:
- sin(2θ) = 2sin(θ)cos(θ)
- cos(2θ) = cos²(θ) - sin²(θ) = 2cos²(θ) - 1 = 1 - 2sin²(θ)
- tan(2θ) = 2tan(θ) / (1 - tan²(θ))
Where θ represents the original angle in degrees or radians.