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GalinKa [24]
2 years ago
14

Trigonometry for anyone who’s bored

Mathematics
2 answers:
Reptile [31]2 years ago
6 0

Answer:

x= 68.19°

Step-by-step explanation:

you can use inverse of cos(x)

cos^{-1}(\frac{2}{5}) =68.19°

∴ x=68.19°

frosja888 [35]2 years ago
4 0

Answer:

we can find the value of x using cos.

cos=adjacent side/hypotenuse

cos(x)=2/5\\

Using inverse cos, we can find the value of x

cos^-1(2/5)=66.42182152\\x=66

(Rounded)

Step-by-step explanation:

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Prove this trigonometric equation;<br><br> - tan^2x + sec^2x = 1,
alekssr [168]
Hey there :)

- tan²x + sec²x = 1    or    1 + tan²x = sec²x

sin²x + cos²x = 1 
Divide the whole by cos²x

\frac{sin^2x}{cos^2x} + \frac{cos^2x}{cos^2x} = \frac{1}{cos^2x}

\frac{sinx}{cosx} = tanx so \frac{sin^2x}{cos^2x} = tan^2x
and
\frac{1}{cosx} = secx so \frac{1}{cos^2x} = sec^2x

Therefore,
tan²x + 1 = sec²x
Take tan²x to the other side {You will have the same answer}

1 = - tan²x = sec²x or sec²x - tanx = 1

3 0
3 years ago
Roxanne is comparing the monthly payments for a new car at two different car dealerships.
andreyandreev [35.5K]

9514 1404 393

Answer:

  A: $563.39

  B: $567.84

Step-by-step explanation:

The attached shows the formula. The graphing calculator evaluates it for the different car choices.

The monthly payment for the car from Dealership A is $563.39.

The monthly payment for the car from Dealership B is $567.84.

5 0
3 years ago
H(x)= 2x+1, Find h(3)
zvonat [6]
H of three is 7 Bc you just plug it in
8 0
3 years ago
Read 2 more answers
Solve: –x – 7 = –2x – 11
Ivan
<span>Simplifying (7 + -2x)(11 + -2x)(x) = 0 Reorder the terms for easier multiplication: x(7 + -2x)(11 + -2x) = 0 Multiply (7 + -2x) * (11 + -2x) x(7(11 + -2x) + -2x * (11 + -2x)) = 0 x((11 * 7 + -2x * 7) + -2x * (11 + -2x)) = 0 x((77 + -14x) + -2x * (11 + -2x)) = 0 x(77 + -14x + (11 * -2x + -2x * -2x)) = 0 x(77 + -14x + (-22x + 4x2)) = 0 Combine like terms: -14x + -22x = -36x x(77 + -36x + 4x2) = 0 (77 * x + -36x * x + 4x2 * x) = 0 (77x + -36x2 + 4x3) = 0 Solving 77x + -36x2 + 4x3 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), 'x'. x(77 + -36x + 4x2) = 0 Factor a trinomial. x((7 + -2x)(11 + -2x)) = 0 </span>
8 0
3 years ago
Read 2 more answers
What is y+8=-5(x+3) in standard form
Papessa [141]

Answer:

-5x + y = -27

Step-by-step explanation:

Equation: y+8 = -5(x+3)

Standard form is (ax + by = c)

We have to get x and y and their coefficients over to the left side of the equation, and all the single numbers to the right side.

y + 8 = -5 (x + 3)

y + 8 = -5x -15

y = -5x - 27

THE ANSWER IS :

-5x + y = -27

5 0
3 years ago
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