Given a right triangle abc, which of the following statements must be true? check all that apply pic in comments

a) sina=cos (90-c)
b)cosa=sinc
c) sina=cos(90-a)
d) angle a and angle c are supplementry

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption