Question

If u = xe^y + ye^x. Find dou u/dou x and dou u/dou y​

Answer 1

Answer:

cos x = cos 60° or x = 60°

Step-by-step explanation:

In 45° = cos 45°= 12√ ; sin 30° = 12

cos x = 2 sin 45° cos 45° – sin 30°= [ 2 × 12√ × 12√ ]- 12

cos x = 1 - 12 = 12

We know cos 60° = 12

Hence cos x = cos 60° or x = 60°

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