Discover Questions

Could a black hole exist within the event horizon of a bigger black hole? If 5sinθ = 3 determine the value of:
1. cos (θ-360)
2. Tan (squared)θ
3. Sin θ x cos θ (all divided by cos (squared θ)? Why is always a problem in recent years, aircraft, whether artificially or incidents? If I save 300 dollars every 2 weeks for 6months how much will I have? Differentiate(t) = (cos^3 t+ 3cost +7)^9?