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3 years ago

7

Find the missing angle

1 answer:

Andrews [41]3 years ago

3 0

Answer:

50°

Step-by-step explanation:

65+65+<z = 180

130+ <z = 180

<z = 50°

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How to solve this :') please help

blsea [12.9K]

Answer:

3/2

Step-by-step explanation:

sin(3π/4 - β) = sin(3π/4)cosβ - cos(3π/4)sinπ =

$\sin(\frac{3\pi}{4}-\beta)=\sin(\frac{3\pi}{4})\cos\beta-\cos\frac{3\pi}{4}\sin\beta\\=\frac{1}{\sqrt{2}}\cos\beta-(-\frac{1}{\sqrt{2}})\sin\beta\\\\=\frac{1}{\sqrt{2}}(\cos\beta +\sin\beta)\\\\\sin^2(\frac{3\pi}{4}-\beta)=\frac{1}{2}\cos\beta +\sin\beta)^2=\frac{1}{2}(\cos^2\beta +\sin^2\beta+2\sin\beta\cos\beta\\=\frac{1}{2}(1+\sin2\beta)=\frac{1}{2}(1-\frac{1}{5}) = \frac{2}{5}\\$

Use $\cot^2x=\csc^2x-1=\frac{1}{\sin^2x}-1$

so

$\cot^2(\frac{3\pi}{4}-\beta)=\frac{1}{\sin^2(\frac{3\pi}{4}-\beta)}-1 = \frac{1}{\frac{2}{5}}-1=\frac{5}{2}-1=\frac{3}{2}$

7 0

2 years ago

Find the sum of partial fraction for x^4/(x-1)(x²-4)

Aneli [31]

Answer:

see attachment

Step-by-step explanation:

7 0

3 years ago

Which of the following best describes the English expression five more than the quantity of a number minus six?

klasskru [66]

5 + x - 6 hopes this helps

8 0

3 years ago

If this number is larger than 6, then its square is larger than 36.The number is not larger than 6.therefore Its square is not l

Anit [1.1K]

Answer:

False

Step-by-step explanation:

If this number is larger than 6, then its square is larger than 36.

If x > 6, then x² > 36

The number is not larger than 6.therefore Its square is not larger than 36.

x ≤ 6; therefore, x² ≤ 36

-7 is < 6; however -7² > 36 as -7² = 49

6 0

3 years ago

Whats the area below

Troyanec [42]

Step-by-step explanation:

3.5*9.0= 31.5cm²

2*2=4 4/2=2

2*2=4

5*2=10 10/2=5

5+4+2+31.5= 42.5cm²

8 0

3 years ago