Question

tanalpha=cosbeta=a,then find (alpha+beta)
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Answer 1

Step-by-step explanation:

Given that : tan alpha=cos beta

we know that

tan (90-theta ) =cot theta

tan alpha=cos beta

tan alpha =tan (90-beta)

=>alpha =90- beta

=>alpha + beta =90°

Answer 2

$\alpha + \beta = {90}^{o}$