Q56 of 354 Page 12

If (cos x)^y = (cos y)^x find .

Here,

Taking log on both sides,

Differentiating it with respect to x using the chain rule and product rule,

If xy = e^{x – y}, find .

If y^x + x^y + x^x = a^b, find .

If cos y = x cos (a + y), where prove that

If prove that:

If (cos x)y = (cos y)x find .