Step-by-step explanation:
( secA + 1)( sec A - 1)
Using the expansion
( a + b)( a - b) = a² - b²
Expand the expression
We have
sec²A + secA - secA - 1
That's
sec² A - 1
From trigonometric identities
<h3>sec²A - 1 = tan ²A</h3>
So we have the final answer as
<h3>tan²A</h3>
As proven
Hope this helps you
Answer:
Jane needs to work 7.7 hours
Step-by-step explanation:
Jane needs $1500
She already has $345
$1500 - $345 = $1155
She needs $1155
Jane makes $150 per hour
$1155 ÷ $150 = 7.7 hours
7.7 hours
Hope this helps :)
Answer:
a
Step-by-step explanation: