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105

Step-by-step Answer
PAGE: 494SET: SelectPROBLEM: 105
Please look in your text book for this problem Statement

The trigonometric identity is .

Prove .

Consider .

Substitute in the above expression.

Apply Trignometric formula: .

Reciprocal of trignometric function: and .

Hale angle identity :

.

Therefore if then .

If then .



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