Question #634e2

Question

1307 views around the world

You can reuse this answer
Creative Commons License

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