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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 equivalent to sin 2 csc 2 - sin 2?
sin2csc2-sin2 (using the fact that the sin is the reciprocal of csc) = 1-sin2
What is sine squared?
Answer 1 Put simply, sine squared is sinX x sinX. However, sine is a function, so the real question must be 'what is sinx squared' or 'what is sin squared x': 'Sin(x) squared' would be sin(x^2), i.e. the 'x' is squared before performing the function sin. 'Sin squared x' would be sin^2(x) i.e. sin squared times sin squared: sin(x) x sin(x). This can also be written as (sinx)^2 but means exactly the same. Answer 2 Sine squared is sin^2(x). If the power was placed like this sin(x)^2, then the X is what is being squared. If it's sin^2(x) it's telling you they want sin(x) times sin(x).
What does sin2a equal?
The expression (\sin^2 a) is equal to ((\sin a)(\sin a)), which represents the square of the sine of angle (a). Additionally, using the Pythagorean identity, (\sin^2 a) can be expressed as (1 - \cos^2 a). This relationship is useful in various trigonometric equations and transformations.
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)
What is sin squared equal to?
Sin^(2)[X] = 1 - Cos^(2)[X] It is based on Pythagorean theorem . Algebraically rearrange Sin^(2)[x] + Cos^(2)[X[ = 1^(2) = 1 Note how it looks like the Pythagorean triangle h^(2) = a^(2) + b^(2) .
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)
Why does sin plus cos equal one?
Sin + Cos Does NOT equal '1'. However, Sin^(2) + Cos^(2) = 1 = ( 1^(2) It is by Pythagoras. Remember in a right angled triangle H^(2) = o^(2) + a^(2) Assume ' h = 1' Then 1^(2) = 1 = o^(2) + a^)2) But o = hSin & a = hCos Substituting 1^(2) = (hSin)^(2) + (hCos(^(2)) However, we assume h = 1 Hence 1^(2) = Sin^(2) + Cos^(2)
What is exact value sin480degrees?
sin 480° is equal to sin 60°, which is sqrt(3)/2 or approximately 0.866.
What does 1 - cos squared equal?
Note that an angle should always be specified - for example, 1 - cos square x. Due to the Pythagorean formula, this can be simplified as sin square x. Note that sin square x is a shortcut of (sin x) squared.
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
