express sin67 + cos 75 in terms of trigonometric ratios of angles between 0 and 45
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sin67 + cos 75
sin(90 - 23 ) + cos (90 -15)
cos23 +sin15
sin(90 - 23 ) + cos (90 -15)
cos23 +sin15
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sin67° + cos75°
= sin( 90° - 23° ) + cos( 90° - 15 )
= cos23° + sin15°
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