2cosx - secx = - tanx
thank you in advance.
i need to solve the equation and give an answer in radians.
- Using and , express everything in terms of sine and cosine.
- Multiply both sides by to get rid of fractions.
- Then use to express everything in terms of .
- Re-arrange as a quadratic in .
- Factorise. You should get:
Can you complete it now?