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If cos(alpha+beta)*sin(gamma+delta)=cos(...

If `cos(alpha+beta)*sin(gamma+delta)=cos(alpha-beta)*sin(gamma-delta),` prove that `cotalphacotbetacotgamma=cotdelta`

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To prove that \( \cot \alpha \cot \beta \cot \gamma = \cot \delta \) given the equation: \[ \cos(\alpha + \beta) \sin(\gamma + \delta) = \cos(\alpha - \beta) \sin(\gamma - \delta) \] we will follow these steps: ...
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RD SHARMA ENGLISH-TRANSFORMATION FORMULAE-All Questions
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  7. If cos A+cosB=1/2 and sin A+ sinB=1/4 , prove that: tan((A+B)/2)=1/2

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  14. Prove that: cos20^0cos40^0cos60^0cos80^0=1/(16)

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  15. Prove that: sin20^0sin40^0sin60^0sin80^0=3/(16)

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  18. Prove that: sin(B-C)cos(A-D) + sin(C-A) cos (B-D) + sin(A-B) cos(C-...

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