Question

integrate sin theta d theta​

Answer 1

Answer:

Step-by-step explanation:

because  

d(cosθ)=(cosθ)' dθ=  

-sinθ dθ=  

sinθd(-θ)  

This hint it's used for easier way to compute integrals without substitution or by parts:  

Example:  

∫sin^2 x cos x dx=  

∫sin^2 x d(sin x)=  

1/3 sin^3 x +C  

In this case you had to use sin x = y ; cos x dx = dy