MATH SOLVE

4 months ago

Q:
# Which relationship in the triangle must be true ?

Accepted Solution

A:

Answer:Choice B. sin(B)=cos(90-B)Step-by-step explanation:That cofunction identity is the one you looking for...choice B.If you aren't convinced or don't know that identity, then maybe this will help:90-B is actually the same thing as saying A for this right triangle since A+B=90.So choice B basically says sin(B)=cos(A)Well let's find both sin(B) and cos(A)sin(B)=b/ccos(A)=b/cThose are the same ratios!So they are equal!