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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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Answer:

3

Step-by-step explanation:

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Hope this helps!

6 0
3 years ago
From the quadratic equation 3x² + X - 5 = 0, find alpha square plus beta square​
timama [110]

Answer:

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Step-by-step explanation:

Assuming α and β are solutions to the equation, it can be factored as ...

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We know that the square (α+β)² can be expanded to ...

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4 0
2 years ago
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Answer:

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