Substitute the value of the variable into the expression and simplify, its theta arrow-to-the-right, pi/4 times 1-tan theta/sin theta - cos theta (i cant type the signs on computer, sorry
To calculate how many points this person got, take 90% of the total:
0.9(70) = 63
A test score of 90% is 63 points out of 70.
Answer: 
<u>Step-by-step explanation:</u>
P = 2(l + b)
Divide both sides by 2:
Subtract b from both sides:
<em>Note: You can also multiply b by </em>
<em> if you want the left side to be one fraction.</em>
