Find .

Using half-angle formula: .

Here, and .

Since is lies in first quadrant, the positive square root is chosen.

.

Find .

Using half-angle formula: .

Here, and .

Since is lies in first quadrant, the positive square root is chosen.

.

Find .

Using half-angle formula: .

Here, and .

Since is lies in first quadrant, the positive square root is chosen.

.

.

.

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