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2 sin squared x plus sin x minus 1 is equal to 0 solve for x?
2 sin2(x) + sin(x) - 1 = 0(2 sin + 1) (sin - 1) = 0Either 2 sin(x) + 1 = 02sin(x) = -1sin(x) = -0.5x = 210°, 330°or sin(x) - 1 = 0sin(x) = 1x = 90°
How can you prove that 1-2 cosine squared over sine times cosine is equal to tangent minus cotangent?
sin2 + cos2 = 1 So, (1 - 2*cos2)/(sin*cos) = (sin2 + cos2 - 2*cos2)/(sin*cos) = (sin2 - cos2)/(sin*cos) = sin2/(sin*cos) - cos2/(sin*cos) = sin/cos - cos-sin = tan - cot
What is cos2x equal to?
You can look up "trigonometric identities" in Wikipedia.Cos(2x), among other things, is equal to (cos x)^2 - (sin x)^2 If you meant cos squared x, or (cos x)^2, that is equal to (1 + cos(2x))/2
What is the sin pi over 2?
sin(pi/2)=1
What is equivalent to sin 2 csc 2 - sin 2?
sin2csc2-sin2 (using the fact that the sin is the reciprocal of csc) = 1-sin2
Are they equal sin-30equals -sin30?
sin-30 = (-1) x 1/(square root of 2) -sin30 = -(1/square root of 2) They are equal
What does sinxcosx equal?
1/2 of sin(2x)
Why is 2 sin theta cos theta equal to sin 2theta?
because sin(2x) = 2sin(x)cos(x)
What does 2sin squared theta equal and why?
It is 2*sin(theta)*sin(theta) because that is how multiplication is defined!
What does sine times cosine equal?
Sin(x) cos(x) = 1/2 of sin(2x)
What is exact value sin480degrees?
sin 480° is equal to sin 60°, which is sqrt(3)/2 or approximately 0.866.
What is the sin pi over 4?
sin(pi/4) and cos(pi/4) are both the same. They both equal (√2)/2≈0.7071■
What does cos2x equal?
Cos(2x) = cos^2(x) - sin^2(x) = 2 cos^2(x) - 1 = 1 - 2 sin^2(x).Source: ChaCha.com
What is Cos squared x equal to?
Cos^2 x = 1 - sin^2 x
Is all sin equal?
yeah. a sin is still a sin.
Cos x sin x is equal to?
The Wikipedia article "Trigonometric identities" lists the following identity (in which I am simply changing variables): cos a sin b = (1/2)[sin(a+b) - sin(a-b)] Here, since the two angles are the same, this simplifies to: cos a sin a = (1/2)[sin(2a) - sin(0)] = (1/2)sin(2a)
Where expression is not equivalent to sin 150?
The expression on your face is not equal to sin 150 as you read this answer.The expression on your face is not equal to sin 150 as you read this answer.The expression on your face is not equal to sin 150 as you read this answer.The expression on your face is not equal to sin 150 as you read this answer.
