Tan (x) = 0.8. To calculate the angle x, find the tan⁻¹ (0.8) = 38.7°
.2 per treat 2 cents per treat
Answer:
y³ + x³ = 1
First, differentiate the first time, term by term:

↑ we'll substitute this later (4th step onwards)
Differentiate the second time:

