Plz help need to graduate

Mathematics

1 answer:

lutik1710 [3]2 years ago

3 0

It's most likely the first or 3rd answer. Apologies If I'm wrong.

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Two angles are supplementary.(They total 180°) One angle measures 3 times the other angle. Find the measure of both angles. The

bezimeni [28]

The smaller angle for the first problem is 45, the larger angle is 135. For the second problem, the length is 14, the width is 10.

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Anita and Susanna are in a 5-mile bike race. The graph

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Answer: she stopped to change a flat tire

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11. Delila is multiplying three negative numbers and determines that the solution will be negative. Is she correct or incorrect?

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Answer: CORRECT

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3 years ago

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Verify the identity. <br><br> tan x plus pi divided by two = -cot x

kogti [31]

Recall that sin(π/2) = 1, and cos(π/2) = 0,

$\bf \textit{Sum and Difference Identities}
\\\\
sin(\alpha + \beta)=sin(\alpha)cos(\beta) + cos(\alpha)sin(\beta)
\\\\
sin(\alpha - \beta)=sin(\alpha)cos(\beta)- cos(\alpha)sin(\beta)
\\\\
cos(\alpha + \beta)= cos(\alpha)cos(\beta)- sin(\alpha)sin(\beta)
\\\\
cos(\alpha - \beta)= cos(\alpha)cos(\beta) + sin(\alpha)sin(\beta)\\\\
-------------------------------\\\\
$

$\bf tan\left(x+\frac{\pi }{2} \right)=-cot(x)\\\\
-------------------------------\\\\
tan\left(x+\frac{\pi }{2} \right)\implies \cfrac{sin\left(x+\frac{\pi }{2} \right)}{cos\left(x+\frac{\pi }{2} \right)}
\\\\\\
\cfrac{sin(x)cos\left(\frac{\pi }{2} \right)+cos(x)sin\left(\frac{\pi }{2} \right)}{cos(x)cos\left(\frac{\pi }{2} \right)-sin(x)sin\left(\frac{\pi }{2} \right)}\implies \cfrac{sin(x)\cdot 0~~+~~cos(x)\cdot 1}{cos(x)\cdot 0~~-~~sin(x)\cdot 1}
\\\\\\
\cfrac{cos(x)}{-sin(x)}\implies -cot(x)$

7 0

2 years ago

Plz help need to graduate​

Plz help need to graduate