Question

verify the following identities. HELP PLEASE !
2. sec^2xcotx-cotx=tanx
3.sinxcosxtanx=1-cosx
4.tanx+cotx=secxcscx

Answer 1

2.
\[\sec^{2}x = 1+ \tan^{2}x\]
\[cotx = \frac{1}{tanx}\]
hence,

\[[(1+\tan^{2}x)(\frac{1}{tanx})] - \frac{1}{tanx}\]

Answer 2

you get \[tanx + \frac{1}{tanx} -\frac{1}{tanx} = tanx\]

Answer 3

for 3. \[tanx = \frac{sinx}{cosx}\]

Sub, factor and solve..

for 4. \[secx= \frac{1}{cosx}, cscx= \frac{1}{sinx}\]

Answer 4

If you can get that on the left side for 4 your good.

Answer 5

how did you get that on 4?

Answer 6

get what?