Mathematics: Complete the identity. cos (alpha - beta)/cos alpha cos beta=? a. 1 + cot α cot β b. tan α tan β + cot β c. 1 + tan α tan β d. 1 + cot α tan β

Complete the identity. cos (alpha - beta)/cos alpha

Ответ:

janahiac09

03.01.2022

When you see a formula like this, try to operate, so you will see some identities sooner or later. In this case, we have a substraction identity:

$\frac{cos ( \alpha - \beta )}{cos \alpha cos \beta }$ = $\frac{cos \alpha cos \beta + sin \alpha sin \beta }{cos \alpha cos \beta }$ = 1 + tan α · tan β

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Ответ:

mttttttthhhhhhh551

12.07.2021

Mathematics

for Pluto is Xlsm

Explanation:

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Complete the identity. cos (alpha - beta)/cos alpha cos beta=?
a. 1 + cot α cot β
b. tan α tan β + cot β
c. 1 + tan α tan β
d. 1 + cot α tan β

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