QuestionExample 4: Prove $\cos x=\frac{1}{\cos x}-\sin x \tan x$
LS RS

Studdy Solution
Now, compare the simplified Right Side (RS) with the Left Side (LS):
The simplified RS is $\cos x$, which matches the LS.
Since both sides are equal, the equation is proven:
$\cos x = \frac{1}{\cos x} - \sin x \tan x$