Question

In triangle ABC, find B, to the nearest degree, given a = 7, b = 10, and C is a right angle.

Answer 1

The correct answer is D 55.

Answer 2

55°

Explanation:

Since ΔABC is right we can use the tangent ratio to find ∠B

tanB =
`(opposite)/(adjacent)` =
`(10)/(7)`, hence

B =
`tan^(-1)`(
`(10)/(7)`) = 55°