Question

In right triangle ABC with right angle B, the sin 48° is equal to the cosine of what angle measure?

Answers:

48°

42°

90°

52°

Answer 1

42

Explanation:

from the trigonometric identity

`sin \beta =cos(90 -\beta )`

if
`\beta`=48 hence

`90-48=42`

hence

`sin48=cos42`