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3 years ago

Find the value of x in the triangle shown below.

Mathematics

1 answer:

Grace [21]3 years ago

8 0

Answer:

Step-by-step explanation:

this is an isosceles triangle

that means the 6cm = the other 6cm on the other side

the base angles are therefore equal

so base = z=z

base is 2z

angles in a triangle add up to 180 degrees

so 180=56+2z

180-56

2z=124

divide by 2 to get 62

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3 years ago

Cos(2theta)=11 sin(theta)-5

lubasha [3.4K]

$\cos2\theta=11\sin\theta-5$
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$\implies\begin{cases}2\sin\theta-1=0\\\sin\theta+6=0\end{cases}$

The second equation gives $\sin\theta=-6$ , but $-1\le\sin\varphi\le1$ for any real $\varphi$ , so we can ignore this equation.

This leaves us with

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where $k$ is any integer.

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LiRa [457]

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