Question

In right triangle ABC, m∠C = 90°. if cos B = 5/13, which function also equals 5/13? I need help quick please!

In right triangle ABC, m∠C = 90°. if cos B = 5/13, which function also equals 5/13?

Answer 1

`sinA=5/13=cosB`.

Explanation:

In the right `DeltaABC, m/_C=90^@`.

`:. m/_A+m/_B=90^@`.

`:. cosB=cos(90^@-A)=sinA`.

`rArr cosB=5/13=sinA`.

Answer 2

`Sin A= 5/13`

Explanation:

In respect of angle `B;Cos B=(BC)/(AB)= 5/13`

In respect of angle `A; sin A= (BC)/(AB)=5/13`

`:. Sin A= 5/13` [Ans]