To determine the value of tan- 7% which identity could be used? 1-cos 4 1. 7 1 sin- 4 sin 4 II. 1- cos 4
To determine the value of tan- 7% which identity could be used? 1-cos 4 1. 7 1 sin- 4 sin 4 II. 1- cos 4 1-cos 4 7 n 1+ cos 4 O I only O I and Il only O I and Ill only OI, II, and Ill
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