EGD, the sides look the same
B=5
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<em>Answer</em>
Part 1: Three and four tenths.
Part 2: 3.0 + 0.4
<em>Explanation. </em>
When writing numbers in words we must use the concept of place values. In this case for instance, the place value of 3 is ones and the place value of 4 is tenths hence called the "<em>four tenths</em>".
3.4 can be written as the sum of 3 and 0.4. So 3.4 in its expanded form is (3+0.4).
Assuming ya meant

to slimplify, we use a variation of the pythagorean identity and a decomposition into the sin and cos
for the pythaogreaon identity

divide both sides by


since

subsitute

recall that

also that cos(x) is an even function and thus cos(-x)=cos(x)
therfore

so we get

decompose them into

and

to get

multiply by

to get

we can furthur simlify to get

the expression simplifies to tan(x)sin(x)