sin75+cos65 in terms of trigonometric ratios of angles between o° and 45°
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sin75+ cos65
sin(90-15)+cos(90-25)
cos15+ sin25
[sin(90-A)=cosA and cos(90-A)=sinA]
sin(90-15)+cos(90-25)
cos15+ sin25
[sin(90-A)=cosA and cos(90-A)=sinA]
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