The period of is .

The period of is .

The period of is .

Reciprocal identity : .

Reciprocal identity : .

Reciprocal identity : .

Since the period of is , its reciprocal period is .

Since the period of is , its reciprocal period is .

Since the period of is , its reciprocal period is .

The period of , is and period is .

The period of , is and period is .