Jawabanmu

2014-04-10T15:58:00+07:00
1. sin a -  \frac{1}{sin a} 

 \frac{sin^{2} a - 1}{sin a}
 \frac{-cos^{2}a }{sin a}
- cot a cos a

2. (sin^{2} a \frac{cos^{2}a }{sin^{2}a } ) + (cos^{2}a \frac{sin^{2}a }{cos^{2}a }
cos^{2}a + sin^{2}a = 1

3. tan a + cot a
 \frac{sin a}{cos a} + \frac{cos a}{sin a}
 \frac{sin^{2}a + cos^{2}a  }{cos a . sin a}
 \frac{1}{cos a . sin a}
 \frac{1}{cos a}  \frac{1}{sin a}
sec a . cos a

4. sin a .  \frac{1}{cos a}  \frac{cos a}{sin a} = 1

5. tidak tahu