**Problem : **
Solve the following equation:
sin(*x*)tan(*x*) = 0
.

**Problem : **
Solve the following equation:
cos(*x*) - tan^{2}(*x*) = 1
.

**Problem : **
Solve the following equation:
sin^{2}(*x*) - 1 = cos^{2}(*x*) + 2
.

**Problem : **
Solve the following equation:
2 sec(*x*)sin^{3}(*x*) = cos(*x*)tan^{2}(*x*)
.

**Problem : **
Solve the following equation:
sin(*x*) + sin(*x*)cot^{2}(*x*) = sec^{2}(*x*) - tan^{2}(*x*)
.

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