All categories

3 years ago

Convert this identity to one using sine term(s) only. 1-2cos(r)^2

Mathematics

1 answer:

Natali5045456 [20]3 years ago

8 0

Pythagorean identity:
sin²+cos²=1
Then cos²=1-sin²
Substitute:
1-2cos²
1-2(1-sin²)
1-2+2sin²
2sin²-1

You might be interested in

For the next six month period Sammy wants to calculate the monthly deviation from the average.

jek_recluse [69]

Answer:

Deviation:

July ----- 289.17

August ----- 339.17

September ----- 14800.17

October ----- -65.83

November ----- 10690.17

December ----- -480.83

3 0

3 years ago

Read 2 more answers

When Mr. Desrosiers was younger, he collected Superman comic books and would save his allowance money to purchase more comic boo

Lemur [1.5K]

Answer:

thirty five comic books

8 0

3 years ago

Sorin hits a cricket ball straight up into the air. After 1.5s, the ball is falling straight down with a speed of 6.5 m/s. We wa

sveticcg [70]

Step-by-step explanation:

We have, Sorin hits a cricket ball straight up into the air. After 1.5 s, the ball is falling straight down with a speed of 6.5 m/s.

We want to find the initial vertical velocity of the ball.

The relation between initial speed, final speed, acceleration and time is given by using first equation of kinematics. Let v₀ is the initial speed. So,

$v=v_o +at$

Here, v = -6.5 m/s, t = 1.5 s and a = -g

$v_o=v-at\\\\v_o=v+gt\\\\v_o=-6.5+9.8\times 1.5\\\\v_o=8.2\ m/s$

So, the initial velocity of the ball is 8.2 m/s and the formula used is (1).

4 0

4 years ago

Solving for x thank youu

Svetach [21]

Answer:

sqrt (90)

Step-by-step explanation:

(13+5) is to z as z is to 5

(13+5) / z = z/5

18/z = z/5

90 = z^2

z = sqrt (90)

5 0

2 years ago

How do I solve this problem <br> -4q - (-8q) + 10

vichka [17]

If you want to evaluate it, -4q-(-8q)+10 is changed to -4q+8q+10 (two negatives equal positive). Next, -4q+8q is 4q (since the bigger number is positive 8q, you subtract and get 4q). Finally, your answer is 4q+10. Hope this helps! :)

4 0

4 years ago