Mathematics Cambridge 3u year 11 help exercise 4B (1 Viewer)

Shazia25

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hahhah lol.... I would..... but I have a different textbook :(
im doing 3U too... hang in there!
p.s im new... how do u make a signature at the bottom of ur reply thing?
 

Shazia25

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I only just realised u uploaded a pic... I still cant do that question... sorry...
 

Drongoski

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Q10

Drop a perpendicular from C to PB; let the foot of this perpendicular be R

Now use this simple fact: if you have a right-angled triangle, hypotenuse of length 'h', with one angle @.
Then the 2 sides: one opp the angle @ and the other adjacent have lengths immediately:
h sin@ and h cos@ respectively.

Now angle CBR = angle PAB = @

Using this fact: AP = x cos @ and PQ = CR = y sin@

.: AQ = AP + PQ = x cos@ + y sin@
 
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