Is the value of the expression (cos 75° - sin 75°) be negative? Justify your answer.
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yes
cos 75°-sin75°
cos 75°- cos (90-75°)
cos75°= cos 90-75
remove cos from both side
75= 90-75
this is not correct answer
cos 75°-sin75°
cos 75°- cos (90-75°)
cos75°= cos 90-75
remove cos from both side
75= 90-75
this is not correct answer
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