From cosx = sin (x + π / 2), X ∈ R, to get the image of y = cosx, X ∈ R, we only need to translate the image of y = SiNx, X ∈ r to -- units, the image of sine function y = SiNx, X ∈ R is called --, and the image of cosine function y = cosx, X ∈ R is called --—— ——There are four blanks in total

From cosx = sin (x + π / 2), X ∈ R, to get the image of y = cosx, X ∈ R, we only need to translate the image of y = SiNx, X ∈ r to -- units, the image of sine function y = SiNx, X ∈ R is called --, and the image of cosine function y = cosx, X ∈ R is called --—— ——There are four blanks in total

From cosx = sin (x + π / 2), X ∈ R, to get the image of y = cosx, X ∈ R, we only need to shift the image of y = SiNx, X ∈ r to (left) by (π / 2) units, the image of sine function y = SiNx, X ∈ R is called (sine curve), and the image of cosine function y = cosx, X ∈ R is called (cosine curve)

((SiNx) - sin (X-30)) / cosx simplification

First, sin (X-30) is expanded, the molecular part is sorted out, and then it is sorted out with the denominator. Finally, it should be in the form of tan