Question

(will give medal and fan testimonial) Proving Trigonometric equations

Answer 1

1st one:
use identity
\[\sec^{2} x = 1+\tan^{2} x\]
\[\rightarrow \cot x(1+\tan^{2} x)^{2} = \cot x+2\tan x + \tan^{3} x\]
from here, FOIL and distribute

Answer 2

? can you give me an example

Answer 3

an example of what?

Answer 4

of how to do it

Answer 5

wait if sec ^2 x = 1 + tan ^2 x
then what will sec ^4 = ?

Answer 6

\[\sec^{4} x = (\sec^{2} x)^{2} = (1+\tan^{2} x)^{2}\]

Answer 7

oh 8O well i feel dumb -.-