Most important Formulas Trigonometry

Sir SagarJanuary 13, 2015January 13, 20150

Most important Formulas Trigonometry

1. $sin^{2}\alpha + cos^{2}\alpha =1$

2. $sec^{2}\alpha - tan^{2}\alpha =1$

3. $cosec^{2}\alpha - cot^{2}\alpha =1$

4. $tan\alpha = \frac{sin\alpha }{cos\alpha }$

5. $cot\alpha = \frac{cos\alpha }{sin\alpha }$

6. $tan\alpha \cdot cot\alpha = 1$

7. $sec\alpha = \frac{1}{cos\alpha }$

8. $cosec\alpha = \frac{1}{sin\alpha }$

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