Can I get a little help please I am having trouble

Mathematics

2 answers:

Fantom [35]2 years ago

7 0

Answer:

3x+90=180

3x=90

x=30

2x30

Step-by-step explanation:

slega [8]2 years ago

6 0

Answer:

45 because you have 90 -180 equals 90 divede that by 2 to get to 45

this is wrong look at the other guys

Step-by-step explanation:

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<h3>Answer: Choice H) 2</h3>

=============================================

Explanation:

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If we were to isolate sine, then,

$\sin^2 x + \cos^2x = 1\\\\\sin^2 x = 1-\cos^2x\\\\\sin x = \sqrt{1-\cos^2x}\\\\$

We don't have to worry about the plus minus because sine is positive when 0 < x < pi/2.

Through similar calculations, $\cos x = \sqrt{1-\sin^2x}\\\\$

Cosine is also positive in this quadrant.

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So,

$\frac{\sqrt{1-\cos^2x}}{\sin x}+\frac{\sqrt{1-\sin^2x}}{\cos x}\\\\\frac{\sin x}{\sin x}+\frac{\cos x}{\cos x}\\\\1+1\\\\2$

Therefore,

$\frac{\sqrt{1-\cos^2x}}{\sin x}+\frac{\sqrt{1-\sin^2x}}{\cos x}=2$

is an identity as long as 0 < x < pi/2

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2 years ago

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3 years ago

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