plutonium-238
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Can someone please show me how you do question 8b and 10? THANKS!!
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Mathematics Cambridge 3u year 11 help exercise 4B (1 Viewer)
- Thread starter plutonium-238
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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@
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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