I think the answer is the Baroque Convention
Hope This Helps :)
Explanation:
you would either take and add them together to equal 90 or take them separate like for example 4x+1=90
it would be equal to 90 because they are complementary angles which add up to 90
-hope this helps
Im sorry i would help but i honestly dont know what gouache is sorry
Answer:
An augmented second raises a not by one whole step and one half step.
A diminished second lowers a not by one whole step and one half step.
Explanation:
In music theory when a note is augmented,(+), it is raised a whole step and one half step. A diminished second lowers a note by a whole step and a half step.