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Trigonometric Expressions

1.Simplify:

trigonometria4
Solution:
trigonometria4r

2.Simplify:

trigonometria5
Solution:
trigonometria5r

3.Simplify:

trigonometria6
Solution:
trigonometria6r

4.Simplify:

(1 + tgx)2 + (1 – tgx)2
Solution:
trigonometria7r

5.Simplify:

trigonometria8
Solution:
trigonometria8r

6.Simplify:

trigonometria9
Solution:
trigonometria9r

7. Simplify:

trigonometria10
Solution:
trigonometria10r

8.Prove the identity:

trigonometria11
Solution:
trigonometria11r

9.Prove the identity:

trigonometria12
Solution:
trigonometria12r

10.Prove the identity:

trigonometria13
Solution:
trigonometria13r

11.Prove the identity:

trigonometria14
Solution:
trigonometria14r

12.Prove the identity:

trigonometria15
Solution:
trigonometria15r