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konstantin123 [22]

2 years ago

7

Explain why (cos((theta))? + (sin((theta))2 = 1

1 answer:

frez [133]2 years ago

5 0

Imagine a right triangle where a and b are the legs and c is the hypothenuse.

Pitagora: a²+b²=c²

Divide by c

(a/c)²+(b/c)²=1

But a/c=sin(B) and b/c=cos(B)

Thus sin² + cos² = 1

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Answer this plzzz my lil brother needs help

GREYUIT [131]

Answer:

6/8 or 3/4

Step-by-step explanation:

Because the denominator is the same, just add all the numerators, 1+2=3, then 3+3=6. So 6/8 or when simplified, 3/4.

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Which operation should you perform last in the expression 12 × 42?

GrogVix [38]

Answer:

The order of operations requires that all multiplication and division be performed first, going from left to right in the expression.

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3 years ago

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Answer is D. Just use 8x2^20

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3 years ago

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Nimfa-mama [501]

${x}^{2} - x - \frac{3}{4} = 0 \\ 4{x}^{2} - 4x - 3 = 0 \\ 4 {x}^{2} - (6x - 2x) - 3 = 0 \\ (4 {x}^{2} - 6x) + (2x - 3) = 0 \\ 2x(2x - 3) + 1(2x - 3) = 0 \\ (2x + 1)(2x - 3) = 0 \\ \\ x = \frac{ - 1}{2} \: and \: \frac{3}{2}$

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2 years ago