( ( ( The speed ) ( of ( any ( sinusoidal wave ) ) ) ) ( ( is ( ( the product ) ( of ( its ( ( wavelength and ) frequency ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN speed)) (PP (IN of) (NP (DT any) (JJ sinusoidal) (NN wave)))) (VP (VBZ is) (NP (NP (DT the) (NN product)) (PP (IN of) (NP (PRP$ its) (NN wavelength) (CC and) (NN frequency))))) (. .)))
The speed of any sinusoidal wave is the product of its wavelength and frequency.
(ROOT (S (NP (NP (DT The) (NN product)) (PP (IN of) (NP (NP (NP (DT a) (NN wave) (POS 's)) (NN wavelength)) (CC and) (NP (PRP$ its) (NN frequency))))) (VP (VBZ is) (NP (PRP$ its) (NN speed))) (. .)))