de 'bcose + csine Find

In the given figure, DE is parallel to the base BC of triangle ABC and AD: DB = 5: 3. Find the ratio : (AD)/(AB) and then (DE)/(BC)

In the given Fig. 3, in DeltaABC, D and E are the mid point of the sides AB and AC respectively. Find the length of DE. Prove that DE = (1)/(2) BC.

In the figure, DE |""| QR and BP are bisectors of /_ EAB and /_ RBA, respectively. Find /_ APB.

Find the de-Broglie wavelength of an electron with kinetic energy of 120 eV.

Find the de-Broglie wavelength of an electron with kinetic energy of 120 eV.

In the adjoining figure , DE is the internal bisector of ∠ D, Find ∠F

In the given figure, if DE || BC, AE = 8 cm, EC = 2 cm and BC = 6 cm, then find DE

In the adjoining figure, DE////BC and D divides AB in the ratio 2 : 3. Find DE, if BC = 7.5 cm.

Find the value of x, in the adjoining figure, if DE||BC.