Question

prove sin80+sin20/cos80+cos20 = tab 50​

Answer 1

Step-by-step explanation:

(i) sin80°cos20° - cos80°sin20° = sin(80° - 20°) (using sin(A - B) = sinAcosB - cosAsinB) = sin60° = √ 3 /2

Answer 2

A watch glass is a round, concave glass dish used for evaporation in chemistry. It can also be employed for weighing solids and as a lid for flasks and beakers.