Rewrite cos2 67.5° – sin2 67.5° using a double-angle identity.
cos 135°
sin 135°<...
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Mathematics, 30.01.2020 00:00, yoboi33
Rewrite cos2 67.5° – sin2 67.5° using a double-angle identity.
cos 135°
sin 135°
cos 33.75°
sin 33.75°
![answer](/tpl/images/cats/otvet.png)
Answers: 3
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