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csc^2 405degrees - tan45degrees
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cosec² 405 - tan 45 = (1/sin 405)² - 1
sin 405 = sin 45 = 1/√ 2
Therefore, (1/sin 405) = √2 and so (1/sin 405)² = 2.
This means that the final value is 1.
Why did the vector cross the road?
It wanted to be normal.
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