Where do I even start?
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Originally Posted by millerst Where do I even start? Hint: ....what happens if we square this equation?
Originally Posted by Jhevon Hint: ....what happens if we square this equation? Then I can use an identity, but would it make more sense to factor out the cosx or something... I'm so lost... or cos2X = ? so it becomes ?
Originally Posted by millerst Then I can use an identity, but would it make more sense to factor out the cosx or something... I'm so lost... or cos2X = ? so it becomes ? please reread my post (note that i did not mention cos(2x)) and answer the question i asked by the way, you squared your identity incorrectly: , since we (should) know that
Originally Posted by Jhevon Hint: ....what happens if we square this equation? so squared it becomes: ? Oh I see... So So
Originally Posted by millerst so squared it becomes: ? Oh I see... So So huh? you're thinking way too hard, Miller Thus, the identity is proved
How does = 1
Originally Posted by millerst How does = 1 The Pythagorean identity. Probably the most basic in trig. Let u = 2x for easier visualisation
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