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Use trigonometric identities to simplify the expression. sec^{2} (\frac{\pi }{2} -x) [sin^{2}(x)-sin^{4}(x)][/tex] Literally have no clue on how to even begin this, so please help if you can!
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Use trigonometric identities to simplify the expression.

sec^{2} (\frac{\pi }{2} -x) [sin^{2}(x)-sin^{4}(x)][/tex]


Literally have no clue on how to even begin this, so please help if you can!

User Rich Hildebrand
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The answer is b I took the test
User Kishan Kumar
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