Trigonomic Equations. I need some guidance understanding a question.?

Clint Barker

New member
This is the question being asked of me.

(i) cos 2?= Sin
(II) sin 2? -1 = cos 2?

giving the answers in radians in the range of 0 to 2?.

I have attempted to answer the question but i seem to of got lost somewhere, now nothing is making sense. Please help me some one before i pull my beard off.
Thanks.
 
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