A) similar to what you see in your textbook, 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 ma, typing m ⋅ a would be correct, but mxawould be incorrect.
ma=
b) enter the expression 2cos2(θ)−1, where θ is the lowercase greek letter theta.
2cos2(θ)−1 =
c) enter the expression asin(x)+15, where asin(x) is the inverse sine function.
asin(x)+15 =
d) enter the expression (√(2gδy)/m), where δ is the uppercase greek letter delta.
(√2gδy/m)=
e) enter the expression n0e−λt, where n0 is n-naught (an n with a subscript zero) and λ is the lowercase greek letter lambda.

The correct representation are as follows:

Part (a):

Part (b):

Part (c):

Part (d):

Part (e):

Further explanation:

in the question it is given that while writing any mathematical expression the symbol to be used for multiplication is .

For example: is incorrect and is correct.

If a mathematical expression is to be written in its explicit form then the symbol is used.

Part (a):

The expression given in part (a) is as follows:

The correct representation of the above expression is as follows:

For multiplication symbol is used.

Part (b):

The expression given in part (b) is as follows:

The correct representation of the above expression is as follows:

For multiplication symbol is used.

Part (c):

The expression given in part (c) is as follows:

The correct representation of the above expression is as follows:

Part (d):

The expression given in part (d) is as follows:

The correct representation of the above expression is as follows:

For multiplication symbol is used.

Part (e):

The expression given in part (e) is as follows:

The correct representation of the above expression is as follows:

For multiplication symbol is used.

Learn more:

1. A problem on greatest integer function link

2. A problem to find radius and center of circle link  

3. A problem to determine intercepts of a line link  

Answer details:

Grade: College

Subject: Mathematics

Chapter: NA

Keywords: Expression, representation, ma, cdot, aestrick, wcos(2theta)-1, asin(x)+15, sqraureroot(2gdeltay/m), N0e-lamda t, lowercase greek, multiplication dot.