Product to Sum Identities Calculator
Posted by Dinesh onUse the simple trigonometry calculator to calculate product to sum of trigonometric identities online.
Product to Sum Trigonometry Identities Calculator
Formula:
Product to Sum Equations:
sin(θ).sin(φ) = [cos((θ)-(φ)) - cos((θ)+(φ))] / 2
cos(θ).cos(φ) = [cos((θ)-(φ)) + cos((θ)+(φ))] / 2
sin(θ).cos(φ) = [sin((θ)+(φ)) + sin((θ)-(φ))] / 2
cos(θ).sin(φ) = [sin((θ)+(φ)) - sin((θ)-(φ))] / 2
tan(θ).tan(φ) = [cos((θ)-(φ)) - cos((θ)+(φ))] / [cos((θ)-(φ)) + cos((θ)+(φ))]