sin90 = 1cos180 = -1tg270 = undefined
So the expression simplifies to:
1 + (-1) + undefined
1 + (-1) is equal to 0, and since tg(270+a) is undefined, the final answer is also undefined.
sin90 = 1
cos180 = -1
tg270 = undefined
So the expression simplifies to:
1 + (-1) + undefined
1 + (-1) is equal to 0, and since tg(270+a) is undefined, the final answer is also undefined.