Verifying Trigonometric Identities/Equations (4 Examples)

In this video, we will go over four challenging examples of verifying trigonometric identities, each of which will require multiple steps. The techniques used to verify the identities in this video are the following: finding the common denominator, converting everything to sin(x) and cos(x), multiplying by the conjugate, and factoring and cancelling.

0:00 — Example 1
3:23 — Example 2
5:43 — Example 3
8:33 — Example 4

[adamskirigwi]

ive never come across such a nice video

[pixy]

at the fist example the why is the cosx and sin x canceled is it because cos/sin=0 or because cos and cos is the same and is is crossed out also as to sin and sin? ty