LearningCat

11 Questions
3 Answers

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Preclac

Let x and y be two perpendicular unit vectors.
(a) Find a formula for the magnitude of an arbitrary linear combination ax+by
of x and y in terms of a and b.
(b) Find the precise condition on a,b,c and d under which the linear combinations read more ..

LearningCat May 14, 2024

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Precalculus

LearningCat May 14, 2024

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Precalculus help

Then what is vector AB? Help :3

LearningCat May 14, 2024

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Precalc help

Let u and v be vectors such that ||u||=3 and ||v||=2 such that the angle between u and v when placed tail to tail is 60 degrees.
Let A be a matrix such that row_1(A)=u and row_2(A)=v.
Then what are Au, Av in that order? (Your answers read more ..

LearningCat May 14, 2024

0

2

3

+48

Precalc

Let a and b be two vectors such that neither of a-b and a+b is the zero vector.
(a) Prove that if the vectors a and b are of equal length, then a-b and a+b are perpendicular.
(b) Prove that if a-b and a+b are perpendicular, then a and b are read more ..

LearningCat May 7, 2024

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Trig help

Find constants a, b, c, d and e such that cos4x=a(sin^4)x+b(sin^3)x+c(sin^2)x+d(sin)x+e for all angles x. In other words, write cos(4x) as a polynomial in sin(x).

LearningCat Feb 27, 2024

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13

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Trig question help

Point is the terminal point of angle theta. Points Q, R, and S and are other terminal points.

List the points P,Q,R, and S and in read more ..

LearningCat Feb 13, 2024

+1

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Trig question

For how many values of such that do we have ? (Note that is a measure in radians, not degrees!)

LearningCat Feb 6, 2024

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help :3

In square ABCD, P is on BC such that BP=4 and PC=1, and Q is on CD such that DQ=4 and QC=1. Find sin of angle PAQ.

LearningCat Oct 31, 2023

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18

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+48

Geometry :3

In traingle ABC, point X is on side BC such that AX=13, BX=10, and CX=4, and the circumcircles of triangles ABX and ACX have the same radius. Find the area of triangle ABC.

LearningCat Oct 28, 2023

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22

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geometry problem halp :3

Let R be the circle centered at (0,0) with radius 10. The lines x=6 and y=4 divide R into four regions R1, R2, R3 , and R4. Let R_i denote the area of region R_i If R1>R2>R3>R4,
then find R1-R2-R read more ..

LearningCat Oct 28, 2023

+48

0

Could you show me how you got that?

LearningCatMay 14, 2024

+48

+1

How did you get a = ( 0, m) and b = (m , 0). Why the 0?

LearningCatMay 7, 2024