sin2xcosx+cos2xsinx=1

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- Feb 16th 2011, 12:18 PMkassums17please solve the trig equation
sin2xcosx+cos2xsinx=1

- Feb 16th 2011, 12:30 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, 12:32 PMpickslides
- Feb 16th 2011, 04:56 PMTacticalPro
- Feb 16th 2011, 05:03 PMProve It
- Feb 16th 2011, 05:13 PMTacticalPro
- Feb 16th 2011, 05:32 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, 05:43 PMTacticalPro
- Feb 16th 2011, 05:46 PMmr fantastic
- Feb 16th 2011, 05:51 PMTacticalPro
- Feb 16th 2011, 05:53 PMProve It
- Feb 16th 2011, 06:04 PMTacticalPro
- Feb 16th 2011, 06:06 PMProve It
Surely you can solve ...

- Feb 16th 2011, 06:16 PMTacticalPro
- Feb 16th 2011, 06:19 PMProve It