Answer:
Step-by-step explanation:
sec(-x) − sin(-x) tan(-x)
So the first step is often to write everything in terms of sine, cosine, or tangent. So let's rewrite using sec x = 1 / cos x:
1/cos(-x) − sin(-x) tan(-x)
Now we need to deal with those -x angles. For that, we use reflection identities:
sin(-x) = -sin x
cos(-x) = cos x
tan(-x) = -tan x
Therefore:
1/cos(x) − sin(x) tan(x)
Now let's rewrite tan(x) as sin(x) / cos(x):
1/cos(x) − sin²(x)/cos(x)
Factoring:
(1 − sin²(x)) / cos(x)
Using Pythagorean identity: sin²(x) + cos²(x) = 1. So 1 − sin²(x) = cos²(x).
cos²(x) / cos(x)
And finally, we divide.
cos(x)
Answer:
The answer is 49.
Step-by-step explanation:
\sin K = \frac{\text{opposite}}{\text{hypotenuse}}=\frac{4.4}{5.8}
sinK=
hypotenuse
opposite
=
5.8
4.4
\sin K = \frac{4.4}{5.8}
sinK=
5.8
4.4
K=\sin^{-1}(\frac{4.4}{5.8})
K=sin
−1
(
5.8
4.4
)
K=49.343\approx 49^{\circ}
K=49.343≈49
Answer:
x=√−16n−28 or x=−√−16n−28
Step-by-step explanation:
Step 1: Add -16n to both sides.
x2+16n+28+−16n=0+−16n
x2+28=−16n
Step 2: Add -28 to both sides.
x2+28+−28=−16n+−28
x2=−16n−28
Step 3: Take square root.
x=√−16n−28 or x=−√−16n−28
Answer: 2(12+6) bc you do the work in parentheses first. Then after you multiply 18 by 2 which is 36. Sorry I suck at explaining stuff
Step-by-step explanation: