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3 years ago

What is the value of x to the nearest tenth tan 64 degrees = x/7

Mathematics

1 answer:

Setler [38]3 years ago

7 0

Tan64°=x/4⇒x=14.35≈14.4

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1+Sin/Cos + Cos/1+Sin = 2Sec

Bond [772]

Step-by-step explanation:

Consider the left-hand side:

$\dfrac{1+\sin{\theta}}{\cos{\theta}} + \dfrac{\cos{\theta}}{1+\sin{\theta}}$

$\:\:\:\:= \dfrac{(1+\sin{\theta})^2 + \cos^2{\theta}}{\cos{\theta}(1+\sin{\theta})}$

$\:\:\:\:=\dfrac{1+2\sin{\theta}+\sin^2{\theta} + \cos^2{\theta}}{\cos{\theta}(1+\sin{\theta})}$

$\:\:\:\:=\dfrac{2+2\sin{\theta}}{\cos{\theta}(1+\sin{\theta})} =\dfrac{2(1+\sin{\theta})}{\cos{\theta}(1+\sin{\theta})}$

$\:\:\:\:= \dfrac{2}{\cos{\theta}} = 2\sec{\theta}$

7 0

3 years ago

*PLEASEEEEEE HELP* 12 in Area = ****ANSWER WITH JUST THE NUMBER/ DON'T INCLUDE "pi" or the "square inches"

Blababa [14]

Answer:

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Step-by-step explanation:

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3 years ago

Which ordered pair is the solution to the system of equations?

prisoha [69]

Answer:

$(3, -3)$

Step-by-step explanation:

{у = 3х - 12

{4х + 6у = −6

4x + 6[3x - 12] = −6

4x + 18x - 72 = −6

−6 = −72 + 22x

+72 + 72

___________

66 = 22x

__ ___

22 22

$3 = x$ [Plug this back into both equations above to get the y-coordinate of −3]; $-3 = y$

I am joyous to assist you anytime.

3 0

3 years ago

What expressions are equivalent to -4+(4+5)

Anit [1.1K]

Answer and Step-by-step explanation:

$Greetings!$

$I'm~Isabelle~Williams~and~I'll~be~answering~your~question!$

$This~equation~is~really~simple~actually.$

$-4+(4+5)$

$=-4+9$

$=5$

$5~is~the~answer~to~your~question!$

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3 years ago

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What is the length of PR?<br><br> Can somebody solve this please?

ahrayia [7]

I think it’s 11 sorry if I’m incorrect

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3 years ago

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