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NISA [10]
3 years ago
10

Solve sint = cos2t, for –4π ≤ t ≤ –2π

Mathematics
1 answer:
e-lub [12.9K]3 years ago
3 0

Answer:

-(23/6)π

-(19/6)π

-3π

Step-by-step explanation:

cos2t=cos^2t-sin^2t => cos^2t=1-sin^2t =>cos2t=1-2sin^2t

sint=1-2sin^2t, if x=sint, thenn we have 2x^2+x-1=0

Here x=0.5, x=-1, as x=sint => sint = -1 solutions for -4π to -2π is t=-3π,

sint = 0.5 solutions for -4π to -2π is t= -(23/6)*π, and t = -(19/6)*π

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serious [3.7K]

Answer:

From the given diagram  and the options, the correct option is,

C. Reflect the figure H over the Y axis, followed by a reflection over the X axis, followed by a translation of 2 units to the right.

Step-by-step explanation:

From the given diagram  and the options, the correct option is,

C. Reflect the figure H over the Y axis, followed by a reflection over the X axis, followed by a translation of 2 units to the right.

7 0
3 years ago
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Apply the laws of exponents, calculate the result and express the result in scientific notation, and as a decimal: (8.1*10^-4)^2
AfilCa [17]
<h3>Answer:</h3>
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<h3>Explanation:</h3>

The rules of exponents say the exponent outside parentheses applies to each factor inside parentheses.

... (8.1*10^-4)^2 = 8.1^2 × (10^-4)^2

... = 65.61 × 10^-8

... = 6.561 × 10^-7 . . . . adjust to scientific notation with one digit left of the decimal point

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4 0
4 years ago
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3 0
4 years ago
Can someone please please help me?? :(
salantis [7]

Answer:

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8 0
3 years ago
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7 0
3 years ago
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