triparnadewanjee07 triparnadewanjee07

17-03-2020
Mathematics

contestada

Angle A is the complement of angle B.
Which equation about the two angles must be true?

A) cos B = sin B
B) sin A = sin B
C) cos A = sin B
D) sin A = cos A

Respuesta :

Danboghiu66 Danboghiu66

17-03-2020

Answer:

C) cos A=sin B

Step-by-step explanation:

A is complement of B: A+B=90⁰

Sin(A)=sin(90-B)=cos(B)

Cos(A)=cos(90-B)=sin(B)

So c)

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