2 years ago

Given that sin x = cos 2x find the value of x

1 answer:

7 0

Answer:

The most straightforward way to obtain the expression for cos(2x) is by using the "cosine of the sum" formula: cos(x + y) = cosx*cosy - sinx*siny. cos(2x) = cos² (x) - (1 - cos²(x)) = 2cos²(x) - 1. = 2cos²(x) - 1.

Step-by-step explanation:

You might be interested in

URGENT PLEASE GET THIS QUICKLY PLEASE<br> If f(x)= 2x+7, find f(2)=

Vaselesa [24]

Answer:

Step-by-step explanation:

2(2) +7

14+7

3 0

2 years ago

Read 2 more answers

K(k + 1)(k + 2) – 3k(k + 1)<br><br> Need a step-by-step guide on how to factor this completely

Dimas [21]

Answer:

Step-by-step explanation:

k(k+1)(k+2) - 3k(k+1)

k and (k+1) are common to both terms.

k(k+1)(k+2) - 3k(k+1) = k(k+1)[(k+2) - 3] = k(k+1)(k-1)

8 0

3 years ago

Approximate the square root of 44 to the nearest tenth

exis [7]

10x=44 x=44 so the square root of 44 is 44 im in 6th grade and i knew that wow

7 0

2 years ago

Read 2 more answers

Simplify 2x + x. What is the answer to this?

larisa [96]

Answer:

Step-by-step explanation:

2x+x = 3x

5 0

3 years ago

Read 2 more answers

-4(10-a)=36 what the steps

SpyIntel [72]

Hey there!☺

$Answer:\boxed{a=19}$

$Explanation:$

$-4(10-a)=36$ Equation

−4(10 − a) = 36 Simplify both sides

(−4)(10) + (−4)(−a) = 36 Distribute

−40 + 4a = 36

4a − 40 = 36

4a - 40 + 40 = 36 + 40 Add 40 to both sides

4a = 76

4a/4 = 76/4 Divide both sides by 4

76/4 = 19 Simplify 76/4

a = 19

Hope this helps!

8 0

3 years ago

Given that sin x = cos 2x find the value of x​

Given that sin x = cos 2x find the value of x