Mathematics, 30.01.2022 23:10, xaiverrodriguez

Help i don't understand this at all

Answers: 2

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answered: CMCM5295

(a) C = 1.41

(b) D = 3.46

Step-by-step explanation:

(a)

(Im pretty sure your teacher already thought this so im skipping most of the steps, but feel free to ask in the comments)

Find C (Cosine version)

Use Formula for Cosine/Sine (You can use both of these formula because both of the angles are 45°)

Cos = $\frac{adj}{hyp}$

$Sin = \frac{Opp}{Hyp}$

Put the 45° with the Cos/Sin and substitute the adj and hyp with the correct values. I'll be substituting the adj with c for simplicity.

Cos45° = $\frac{c}{2}$

Multiply both sides by 2 so that c can be alone

2 ⋅ Cos45° = $\frac{c}{2}$ ⋅ 2

= 2Cos45° = c

Flip it so that the c goes in first for it to be easier to understand

c = 2Cos45°

Put the 2Cos45° into a scientific calculator and we're done

c = 1.41

Find C (Sine Version)

Same thing with Cosine Version

Sin45° = $\frac{c}{2}$

2 ⋅ Sin45° = $\frac{c}{2}$ ⋅ 2

c = 2Sin45°

c = 1.41

(b)

Find D

Use Formula for Sine

Sin = $\frac{Opp}{Hyp}$

Put the 60° with the Sin and substitute opp and hyp with correct values. Substitute Opp with d.

Sin60° = $\frac{d}{4}$

Multiply both sides by 4 so d can be alone

4 ⋅ Sin60° = $\frac{d}{4}$ ⋅ 4

d = 4Sin60°

d = 3.46

answered: Guest

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction: this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology: the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion: the last is the discussion, this can be either by management people or persons who are all interested , etc.

answered: Guest

hi how are you doing today? if you ever need just tell me

step-by-step explanation: