4x+3+27=90
4x+30=90
90-30 =60
60/4 =15
X=15
Answer:
(-3,3)
Step-by-step explanation:
4-7 is -3 and 1+2 is 3 so it is (-3,3)
Answer:
9a + 3b
Step-by-step explanation:
Given
5(3a + b) - 2(3a + b) ← distribute both parenthesis
= 15a + 5b - 6a - 2b ← collect like terms
= 9a + 3b
Unit Imaginary Number The "unit" Imaginary Number (the equivalent of 1 for Real Numbers) is √(−1) (the square root of minus one). In mathematics we use i (for imaginary) but in electronics they use j (because "i" already means current, and the next letter after i is j).
-1= i
Question:<u /> <em>Simplify the trigonometric expression sec</em><span><em>Өcos</em></span><span><em>Ө.</em></span>
For each of the three basic trig functions, (sin, cos, tan) there are three more which act as their reciprocals. (csc, sec, and cot respectively)
Reciprocals, of course, are flipped fractions. If you have some number x, the reciprocal can be expressed as
.
An important property of reciprocals is that if you mutliply them together they will cancel out--take
for example.
Since sec
<span>Ө is literally <em>defined</em> as the reciprocal of cos</span><span>Ө, it is evident that
</span>