3 years ago

Which of the following statements are true? Select all that apply

Mathematics

2 answers:

kykrilka [37]3 years ago

6 0

A & D are true statements

torisob [31]3 years ago

6 0

A/d are both true statements

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How to write one fifth of the square of a number

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3 years ago

A:24<br> B:12<br> C:35<br> D:117

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Answer:

Step-by-step explanation:

total 180

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Find the exact value of sin(255∘)

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Check the picture below.

$\textit{Sum and Difference Identities} \\\\ sin(\alpha + \beta)=sin(\alpha)cos(\beta) + cos(\alpha)sin(\beta) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ sin(255^o)\implies sin(135^o+120^o) \\\\\\ sin(135^o)cos(120^o)~~ + ~~cos(135^o)sin(120^o) \\\\\\ \left( \cfrac{\sqrt{2}}{2} \right)\left( -\cfrac{1}{2} \right)~~ + ~~\left( -\cfrac{\sqrt{2}}{2} \right)\left( \cfrac{\sqrt{3}}{2} \right)\implies -\cfrac{\sqrt{2}}{4}~~ - ~~\cfrac{\sqrt{6}}{4}\implies \cfrac{-2-\sqrt{6}}{4}$