Question 3 O pts
Isosceles trapezoid JKLM has legs JK and LM. If JK = 5x-10, and LM = 9x + 7, find the
value of x.

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Ответ:

lizatapper3086

18.04.2022

Mathematics

Recall that secx is the reciprocal of cosx.
Also, recall the property:
$cos^{2}x + sin^{2}x = 1$

$\therefore cos^{2}x = 1 - sin^{2}x$

Thus, we can rewrite the equation as:
$secx tanx (1 - sin^{2}x) = secx tanx cos^{2}x$
= tanx cosx

$= \frac{sinx}{cosx} \cdot cosx$
= sinx

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Question 3 O pts Isosceles trapezoid JKLM has legs JK and LM. If JK = 5x-10, and LM = 9x + 7, find the value of x.