Solving trigonometric equations using double-angle identities

Lesson: 1a
9:23
Lesson: 1b
19:49

Learn
Practice

Solving trigonometric equations using double-angle identities

Basic concepts: Reference angle, Find the exact value of trigonometric ratios, ASTC rule in trigonometry (All Students Take Calculus), Double-angle identities,

Lessons

1.
Utilizing "Double-Angle Identities" to solve:

a)
$\cos 2x = 2 \sin^2x$
$0 \leq x$ < $2\pi$

b)
$\tan x - \cot x = 2$
$0 \leq x$ < $2\pi$

No Javascript

It looks like you have javascript disabled.

You can still navigate around the site and check out our free content, but some functionality, such as sign up, will not work.

If you do have javascript enabled there may have been a loading error; try refreshing your browser.