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3 years ago

10

Find the value of x 60° 80° 70°

1 answer:

klemol [59]3 years ago

6 0

Answer:

that is 70° I hope you get a A+

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Help please I’ll give points

bearhunter [10]

Answer:

3 and 8 are supplementary

4 is congruent to 8

3 is congruent to 1

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3 years ago

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attashe74 [19]

I'm pretty sure it is C....

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4 years ago

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If cos(θ)= -2/3 and θ lies in quadrant II, find the value of cotθ

Lera25 [3.4K]

$\text{Given that,}\\\\\cos \theta = - \dfrac 23\\\\\implies \cos^2 \theta = \dfrac 49\\\\\implies 1- \sin^2 \theta = \dfrac 49\\\\\implies \sin^2 \theta =1-\dfrac 49\\\\\implies \sin^2 \theta =\dfrac 59\\\\\\\text{Now,}\\\\\cot^2 \theta = \dfrac{\cos^2 \theta}{\sin^2 \theta} \\\\\\\implies \cot^2 \theta = \dfrac{\tfrac 49}{\tfrac 59}\\\\\\\implies \cot^2 \theta = \dfrac 49 \times \dfrac 95\\\\\\\implies \cot^2 \theta = \dfrac 45\\\\\\$

$\implies \cot \theta = \pm\sqrt{\dfrac 45} = \pm \dfrac 2{\sqrt 5}\\\\\\\text{Since}~ \theta ~ \text{lies in the second quadrant,} \cot \theta ~\text{will be negative.}\\\\\text{Hence,}~ \cot \theta = - \dfrac{2}{\sqrt 5}$

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2 years ago

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Jack earned $972 in 6 years on an investment at a 3% annual simple interest rate. How much was Jack’s investment?

Tanya [424]

Answer:

the answer would be $5400

Step-by-step explanation:

5400 times .03 = 162, 162 times 6=972

8 0

4 years ago

Please help me please

Anna [14]

Answer:

It's $22.30 and Hi army! Good luck

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4 years ago