1,320 prompts matching "Finding the equation of a circle from its centre and radius"
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Explain Back: The determinant of a product as the product of the determinants
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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Explain Back: What a coefficient determinant of nought says about the system
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Explain Back: Writing out the full matrix of cofactors
I have just studied writing out the full matrix of cofactors in my SS3 Further Mathematics
Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Worked Example: The identity that A times its adjoint gives the determinant times the identity
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Learn: The order of the steps in inverting a 3 by 3 matrix
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Explain Back: The inverse of a diagonal matrix
I have just studied the inverse of a diagonal matrix in my SS3 Further Mathematics class.
Explain Back: Solving two simultaneous equations by multiplying by the inverse
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Worked Example: The weight of a body as mass times g
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Explain Back: The resultant of two forces acting in the same straight line
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Worked Example: The direction of the resultant of two forces
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Learn: The resultant of two perpendicular forces
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Spot My Mistake: The greatest and the least resultant of two given forces
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Learn: The component of a force along a stated direction
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Explain Back: The forces acting on a body hanging from two strings
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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Worked Example: Using the sine rule on the triangle of forces
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Worked Example: Drawing the polygon of forces to scale
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Spot My Mistake: Why friction does not depend on the area of contact
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