Tính đạo hàm riêng cấp 2 theo y của hàm số z = sin²y + x³y² + 5∧y

Which expression will have the same sum as 3_8 + 1/4?

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.