britbrat4290
Complete the identity..



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britbrat4290
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Coolsector
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so sin(a+b) = sinacosb + cosbsina
can you do it now ?

britbrat4290
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what is the value of that b sign ?

Coolsector
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a  alpha , b  beta

britbrat4290
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its not on my calc .. confused by that one

Coolsector
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\[\sin(\alpha\ + \beta\ )= \sin(\alpha\ )\cos(\beta\ ) + \sin(\beta\ )\cos(\alpha\ )\]

Coolsector
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this is an identity.. can you solve your problem using this now ?

britbrat4290
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tan α + tan β .... or do i have those reverse ?

Coolsector
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correct