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Novay_Z [31]
3 years ago
7

How to verify 10 and 11

Mathematics
1 answer:
Semmy [17]3 years ago
4 0
10. LHS = tan2x = 2tanx/(1 - tan^2x)
Now, we can divide the LHS by tanx to yield the numerator as 2.

So, 2tanx/tanx/(1 - tan^2x)/tanx
= 2/(1/tanx - tanx)
= 2/(cotx - tanx)

11. LHS = 1 + sin2x/2 = 1 + sinxcosx
Since we want secx on the bottom, we divide by 1/cosx.
(1 + sinxcosx)/(1/cosx) = (secx + sinx)/secx
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3 years ago
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MZRSK = x + 53, m KST = x + 109,<br> and mZRST = 156º<br><br><br> Find x.
Dahasolnce [82]

Answer:

-3 = x

Step-by-step explanation:

Since we are not given a midpoint, we use the Angle Addition Postulate:

156 = [x + 109] + [x + 53]

156 = 162 + 2x

-162 - 162

_______________

−6 = 2x

___ ___

2 2

−3 = x

[−3 + 53] + [−3 + 109] = 156

50 106

156 = 156 ☑

Therefore, -3 = xis a genuine statement.

I am joyous to assist you anytime.

4 0
3 years ago
In circle O, what is mArc A E?
posledela

Answer:

Option (3). 120° will be the answer.

Step-by-step explanation:

By using the theorem of secants intersecting externally,

Measure of angle formed by two secants, from a point outside the circle is half the difference of the measures of the intercepted arcs.

m∠C = \frac{1}{2}(m\widehat{AE}-m\widehat{BD})

36° = \frac{1}{2}(m\widehat{AE}-48)

72° = m\widehat{AE}-48°

m\widehat{AE} = 72 + 48

m\widehat{AE} = 120°

Therefore, Option (3) is the answer.

7 0
3 years ago
Write the fraction as a percent. 9/20
RideAnS [48]

Answer:Write 9/20 as a percent. Use equivalent fractions: 9/20 = 45/100 = 45%.

Step-by-step explanation:

4 0
3 years ago
What is a/3+4=6? I can't figure it out!
kotykmax [81]

Answer:

a = 6

Step-by-step explanation:

first try to divide all numbers by 3 and the add 4 to it until you get 6

8 0
3 years ago
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