UPSKILL MATH PLUS

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Find the value of the following:
 
(i)cos47°sin43°2+sin72°cos18°22cos245° =
 
(ii)cos70°sin20°+cos59°sin31°+cosθsin(90°θ)8cos260° =
 
(iii)tan15°tan30°tan45°tan60°tan75° =