Question

show that cos38cos52-sin38sin52=0​

Answer 1

hey mate refer to the attachment.

if helpful mark as brainly.

Answer 2

cos38° cos 52°− sin 38° sin 52°

= cos (90° − 52°)cos (90°−38°)− sin 38° sin 52°

= sin 52° sin 38°− sin 38° sin 52°

= 0

Hence proved!

HOPE IT HELPS.