sin2xcosx+cos2xsinx=1

Printable View

- Feb 16th 2011, 01:18 PMkassums17please solve the trig equation
sin2xcosx+cos2xsinx=1

- Feb 16th 2011, 01:30 PMe^(i*pi)
Use the double angle identities, I have used the sin form of cos(2x) because I want to eliminate cos

Of course and hence we have

- Feb 16th 2011, 01:32 PMpickslides
- Feb 16th 2011, 05:56 PMTacticalPro
- Feb 16th 2011, 06:03 PMProve It
- Feb 16th 2011, 06:13 PMTacticalPro
- Feb 16th 2011, 06:32 PMProve It
Use the Factor Theorem to find a linear factor and use long division to factorise this cubic to its linear and quadratic factors. Factorise the quadratic if possible. Then solve using Null Factor Law.

- Feb 16th 2011, 06:43 PMTacticalPro
- Feb 16th 2011, 06:46 PMmr fantastic
- Feb 16th 2011, 06:51 PMTacticalPro
- Feb 16th 2011, 06:53 PMProve It
- Feb 16th 2011, 07:04 PMTacticalPro
- Feb 16th 2011, 07:06 PMProve It
Surely you can solve ...

- Feb 16th 2011, 07:16 PMTacticalPro
- Feb 16th 2011, 07:19 PMProve It