Question

how it is came 18°,72°,90 °​

Answer 1

Answer:

First, you should draw a picture. Let the two acute angles be θ and ϕ. Let the side opposite θ be a, and the side opposite ϕ be b. Then:

θ=18o

ϕ=72o

sinθ=1/4(5–√−1)=a/x

cosθ=58+5√8−−−−−−√=b/x

It follows that

a=x/4(5–√−1)=0.309017x

b=x58+5√8−−−−−−√=0.951057x

One way to check your answer is to show

a2+b2=x2

I encourage you to do that.

Step-by-step explanation:

I THINK U HAD WRITTEN ANSWER THERE

Answer 2

Answer:

1x+4x+5x=180⁰

10x=180⁰

x=18⁰

1×18=18⁰

4×18=72⁰

5×18=90⁰

Step-by-step explanation:

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