Question

Can someone please help me please help me I really need help please help me .

Answer 1

`B) sin(\alpha )`

Explanation:

`sin(90-0)=Cos(0)`

`Cos(90-0)=sin(0)`

`So...`

`Cos(90-\alpha )= sin(\alpha )`

`------------`

hope it helps...

have a great day!!

Answer 2

cos(90°-a)

since it lies in first quadrant

sina

your option is B.sin(a)