Question #75f4f

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Answer 1 · 2016-10-31T03:10:54

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#(sin(s+t))/(cos s cos t)=tan s+ tan t#

Left Side:#=(sin(s+t))/(cos s cos t)#

#=(sin s cos t+cos s sin t)/(cos s cos t)#

#=(sin s cancel cos t)/( cos s cancel cos t) + (cancel cos s sin t)/(cancel cos s cos t)#

#=sin s / cos s + sin t/ cost#

#=tan s + tan t#

#=#Right Side