Question

prove that cos^2(alfa-bita)+cos^2bita-2cos(alfa-bita)cosalfa cos bita is independent of bita ​

Answer 1

Answer:

sorry.....

Step-by-step explanation:

Answer 2

Step-by-step explanation:

cos²(α - β) + cos²(α + β) - cos2α cos2β

⇒ cos²α - cos²β + cos²α + cos²β - cos2α cos2β

⇒ cos(2α) cos(2β) + 1 - cos2α cos2β

⇒ cos(2α) cos(2β) - cos2α cos2β = 1

Therefore,

It is proved that given equation is independent.

Hope it helps!