find The value of the expression (cos2 67° – sin2 23°)
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=cos²67°-sin²23°
=sin²(90°-67°)-sin²23°
=sin²23°-sin²23°
=0
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=sin²(90°-67°)-sin²23°
=sin²23°-sin²23°
=0
hope this helps you
please mark the answer as the brainliest.
thank you
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