AIR MATH

Math Question

Write the expression as the sine or cosine of an angle. \( \cos 7 y \cos 3 y-\sin 7 y \sin 3 y \) Hint: \( \sin (A \pm B)=\sin A \cos B \pm \cos A \sin B \) \( \cos (A \pm B)=\cos A \cos B \mp \sin A \sin B \)

Solution

solution

AIR MATH homework app,
absolutely FOR FREE!

  • AI solution in just 3 seconds!
  • Free live tutor Q&As, 24/7
  • Word problems are also welcome!
appstoreplaystore

Scan the QR code below
to download AIR MATH!

qrcode