add/subtract 360 until you get to an angle you recognize
sin480 = sin120 = sin60 = √3/2
cos765 = cos45 = 1/√2
tan225 = 1
cos -330 = cos30 = √3/2
now plug and chug
Please Do This And Explain It .
Simplify without using calculator leaving your answer in surd form.
sin 480 - cos 765
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tan 225- cos(- 330)
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