1) Similar to what you, you can generally omit the multiplication symbol as you answer questions online, except when the symbol is needed to make your meaning clear. For example, 1⋅105 is not the same as 1105. When you need to be explicit, type * (Shift + 8) to insert the multiplication operator. You will see a multiplication dot (⋅) appear in the answer box. Do not use the symbol ×. For example, for the expression typing m . a would be correct, but mxa would be incorrect.2) Enter the expression 2cos2(θ)−1, where θ is the lowercase Greek letter theta.3) Enter the expression asin(x)+15, where asin(x) is the inverse sine function.4) Enter the expression (√(2gΔy)/m), where Δ is the uppercase Greek letter Delta.5) Enter the expression N0e−λt, where N0 is N-naught (an N with a subscript zero) and λ is the lowercase Greek letter lambda.