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3 years ago

Can Someone Help, Please. ?

Mathematics

2 answers:

nevsk [136]3 years ago

7 0

Answer:

I would go with 1, -1.

stealth61 [152]3 years ago

3 0

I Think it should be the third option...
Substitute the values of x and y in each case
7(1)-3(-1)
7+3
10

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4 years ago

What value of θ makes cosθ = sin70° a true statement? A) 20° B) 40° C) 70° D) 90°

Delvig [45]

Answer:

A) 20°

Step-by-step explanation:

Sine and cosine are co-function complements which means that value of sine of an angle is equal to the value of cosine of the complementary angles.

This can be represented by:

$\sin\theta=\cos(90\°-\theta)$

$\cos\theta=\sin(90\°-\theta)$

Given statement:

$cos\theta=\sin70\°$

Applying co-function complements

$\cos\theta=\sin(90\°-\theta)$

Since, we can represent 70° = 90°-20°

$\cos20\°=\sin(90\°-20\°)$

Thus, $\theta=20\°$ makes the statement true.

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3 years ago

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xeze [42]

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Step-by-step explanation:

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3 years ago