Question

is alpha plus beta is equal to 90 degree then sin alpha minus cos beta is equal to​

Answer 1

Answer:

Hlo...

Step-by-step explanation:

A+B=90 THEN.

B=90-A

NOW SIN. A-COS. B=SIN. A-(COS90-A).

SINA-SINA=0. ...... (COS90-A=SINA).

@BBLEGEND