Find all solutions of the equation in the interval [0,2pi)

sinx= -cos^2 x-1
Write your answer in radians in terms of pi.
If there is more than one solution, separate them with commas.

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?