What is the value of(cos square 67-sin square 23)?
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Answered by
2
cos²67° - sin²23°
= cos²67° - sin² ( 90° - 67° )
= cos² 67° - cos²67°
= 0 [ • Required answer ]
Answered by
0
sin(90-23)*sin(90-23)=sin^2(90-23)=cos^2(67)
therefore
cos^2(67)-cos^2(67)=0
MARK BRAINLIEST.
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