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Right triangles and trigonometry

Question 1 of 3

Know the idea

A right triangle has legs of length

8

and

15

. What is the length of the hypotenuse?

Worked example

Pythagorean theorem:

c^{2} = 8^{2} + 15^{2} = 289

, so

c = 17

Video walkthrough

Use the existing worked examples and practice while this walkthrough is being prepared.

In right triangle

ABC

, angle

C

is the right angle and

\sin (A) = 0.44

. What is

\cos (B)