3 years ago

Use double angle formulas to find the exact value of sin2x,cos2x, and tan2x

1 answer:

5 0

Sin2x = 2sinxcosx;
cos2x = (cosx)^2 - (sinx)^2;
tan2x = (sin2x)/(cos2x);

cosx = 5/13 from formula (sinx)^2 + (cosx)^2 = 1;

=> sin2x = 120/169;
.................................

You might be interested in

If B is the midpoint of ac, ab=x+6, and ac =5x-6, then what is bc?

anygoal [31]

Subtract AB (x+6) from AC (5x-6) to obtain BC
BC should be equal to 4x-12

6 0

3 years ago

What is the longest flagpole ( in whole feet) that could be shipped in a box that measures 2ft by 2 ft by 12 ft

creativ13 [48]

I believe the answer is 12 feet because 12 feet is the longest dimension

3 0

3 years ago

In the figure below, lines m and n are parallel. What is the value of x?

alexira [117]

Answer:

x = 51

Step-by-step explanation:

It looks like alt int. angles (correct me if im wrong)

3x - 40 = 2x + 11

x = 51

8 0

3 years ago

Trigonometry<br> Trigonometric Functions<br> Given: Sin θ = (2/3), Find: Cosec θ

rosijanka [135]

Answer:

csc θ = (3/2)

Step-by-step explanation:

Cosecant is just the inverse of sine

8 0

3 years ago

Solve for x<br> <img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bx-9%7D" id="TexFormula1" title="\frac{1}{x-9}" alt="\frac{1}{

Anna [14]

r = 1/15

a branliest from the answer will be appreciated

8 0

2 years ago

Read 2 more answers