Question #634e2

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Answer 1 · 2016-11-08T17:52:15

see below

#(sin(s+t))/(cos scos t) =tans+tant#

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

#=(sins cos t+cos s sint)/(cos s cos t)#

#=(sins cos t)/(cos s cos t)+(cos s sint)/(cos s cos t)#

#=(sins cancel cos t)/(cos s cancel cos t)+(cancel cos s sint)/(cancel cos s cos t)#

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

#=tan s + tan t#

#:.=#Right Side