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Prove

Asked by 27th August 2008, 9:24 PM
Answered by Expert
Answer:

let y = (23+3)sinθ + 23cosθ

multiply and divide by a where a= ( (23+3)2 + (23)2 )1/2 = ( 33+123 )1/2

y = a ( ( (23+3)/ a)sinθ + (23/ a)cosθ )

= a sin(θ + b)

where sin b = (23/ a) and cos b = (23+3)/ a

so clearly y will vary between - a and a. since sin(θ + b) varies between -1 and 1

so i think there is some error in this question.

so please check and repost it.

Answered by Expert 12th September 2008, 3:04 PM
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