if 0<a<pi/2

prove that tana = root all (1-cos2a)/(1+cos2a)

( the square root is above the entire right hand side)

and

if 4tan(a-b) = 3tana, prove that tanb = sin2a/(7+cos2a)

thanks for any help, i really appreciate it ! =D

Printable View

- July 25th 2009, 04:26 AMflyinhigh123trig cont.
if 0<a<pi/2

prove that tana = root all (1-cos2a)/(1+cos2a)

( the square root is above the entire right hand side)

and

if 4tan(a-b) = 3tana, prove that tanb = sin2a/(7+cos2a)

thanks for any help, i really appreciate it ! =D - July 25th 2009, 04:48 AMrunning-gag
- July 25th 2009, 06:54 AMyeongil
- July 25th 2009, 07:48 AMSoroban
Hello, flyinhigh123!

Quote:

Prove: .

We have: .

. . Therefore: .

Quote:

If , prove that: .

. .

. .

. .

. .

. .

. .

. . . .

Multiply by