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2 years ago

11

Solve –2k + 12 9 b. k -9

2 answers:

Rina8888 [55]2 years ago

8 0

Answer:

x2-9

8t-8

x2-1

Step-by-step explanation:

Sunny_sXe [5.5K]2 years ago

7 0

Answer:

180

Step-by-step explanation:

-2 x -9 = 18

18+12= 30

30 x 9 = 180

180

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sergeinik [125]

Answer:

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Step-by-step explanation:

Given:

$\sin^2\theta=0.75$

To find $\cos\theta$

Using trigonometric relations for sums and differences of squares of the ratios.

We know:

$\sin^2\theta+\cos^2\theta =1$

Plugging in $\sin^2\theta=0.75$ in the above relation.

$0.75+\cos^2\theta =1$

Subtracting both sides by 0.75.

$0.75+\cos^2\theta-0.75 =1-0.75$

$\cos^2\theta =0.25$

Taking square root both sides.

$\sqrt{\cos^2\theta} =\sqrt{0.25}$

∴ $\cos\theta=\pm0.5$ (Answer)

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Answer:

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Step-by-step explanation:

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