Question
Simplify the following trigonometric expression:
14 tan 25° cot 25° − 6 cos 39° sec 39°Solution
tan 25° × cot 25° = 1 cos 39° × sec 39° = 1 Now, 14 tan 25° cot 25° − 6 cos 39° sec 39° = 14(1) − 6(1) = 14 − 6 = 8
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