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C3 question
any body can solve this ?
express this expression 5sin^2(x)-3cos^2(x)+6sin(x)cos(x) in terms of
a*sin(2x)+bcos(2x)+c
express this expression 5sin^2(x)-3cos^2(x)+6sin(x)cos(x) in terms of
a*sin(2x)+bcos(2x)+c
Reply 1
Can you expand sin2x and cos2x?
Reply 2
No u have to work on the first equation
Reply 3
You don't have to.
5sin2x - 3cos2x + 6sinxcosx = asin2x + bcos2x + c.
Expand sin2x and cos2x (in all their possible forms). Then compare left and right hand sides.
5sin2x - 3cos2x + 6sinxcosx = asin2x + bcos2x + c.
Expand sin2x and cos2x (in all their possible forms). Then compare left and right hand sides.
Reply 4
aha I got it thnx
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