Qer
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#1
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#1
http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf

need help in last question last part not getting right answer by using cosine
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RDKGames
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#2
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(Original post by Qer)
http://pmt.physicsandmathstutor.com/...%20Edexcel.pdf

need help in last question last part not getting right answer by using cosine
What have you tried??
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Qer
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Name:  Untitled.png
Views: 108
Size:  3.8 KBI MADE THE SKETCH AND USED COSINE RULE BUT GETTING the WRONG ANSWER

CORRECT ANSWER IS 41.8 I THINK
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username2769500
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#4
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(x-a)^2+(y-b)^2=r^2
(a,b) is the centre of the circle.
the diameter, d = 1/2r
the diameter is equal to sqrt(rise^2+run^2)

The sine rule and the cosine rule are both first viewed in C2 for the first time.
Cosine Rule.
 a^2 = b^2 + c^2 -2bccos(A) .
Sine Rule
 a|sin(A) = b|sin(b) = c|sin(c)
The word BIG TRIANGLE is on a syllabus.

try those hints above
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RDKGames
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#5
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(Original post by Qer)
I MADE THE SKETCH AND USED COSINE RULE BUT GETTING the WRONG ANSWER

CORRECT ANSWER IS 41.8 I THINK
Why do you say that RQ length is 20??

The length of PR is 20...
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Qer
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#6
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(Original post by RDKGames)
Why do you say that RQ length is 20??

The length of PR is 20...
OHH
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