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Satyom D.

asked • 07/29/17

if cosθ+cos∅=a and sinθ+sin∅=b than show that cos(θ+∅)= a²-b²/a²+b²

Plz help me to prove this...

Andy C.

Now the parenthesis are absolutely critical.
Do you mean:
(A^2-b^2)/(a^2+b^2)
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07/29/17

1 Expert Answer

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Andy C. answered • 07/30/17

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Satyom D.

Thanks...it will help me...
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08/01/17

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