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(sinx-siny)/(cosx+cosy)=tan(x-y)/2 ||11th exercise 3.3 question18
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(sinx-siny)/(cosx+cosy)=tan(x-y)/2 ||11th exercise 3.3 question18
11th Ex 3.3 Q 18. (sin x - sin y)/(cos x + cos y) = tan (x-y)/2
`(sinx-siny)/(cosx+cosy)=tan(x-y)/(2)`
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Prove that: `(sinx-siny)/(cosx+cosy)` `=tan` `(x-y)/2`...
Prove that: `(sinx-siny)/(cosx+cosy)` `=tan` `(x-y)/2`...
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Prove that : `(sin x - sin y)/(cos x + cos y) = tan ((x-y)/2)`
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