Question

Find the value of cos 38° x cos 52 - sin 38" x sin 52°​

Answer 1

Answer:

• cos 38° cos 52° - sin 38° sin 52° = 0

Step-by-step explanation:

Given:

• Trigonometric equation.

To Find:

• Value of cos 38° cos 52° - sin 38° sin 52°.

As, given values are lesser than 90°, so it lies in 1st Quadrant. In 1st Quadrant all values are positive.

⇒ cos 38° cos 52° - sin 38° sin 52°

⇒ cos 38° cos (90° - 38°) - sin 38° sin (90° - 38°)

⇒ cos 38° sin 38° - sin 38° cos 52°

⇒ 0