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4 years ago

Convert 150° to radians

Mathematics

2 answers:

STatiana [176]4 years ago

6 0

Answer:

I do not know sorry wish I could help

Step-by-step explanation:

boyakko [2]4 years ago

4 0

Answer:

76ygffffffffff

Step-by-step explanation:

need pts

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Cos^2x+cos^2(120°+x)+cos^2(120°-x)<br>i need this asap. pls help me

o-na [289]

Answer:

$\frac{3}{2}$

Step-by-step explanation:

Using the addition formulae for cosine

cos(x ± y) = cosxcosy ∓ sinxsiny

---------------------------------------------------------------

cos(120 + x) = cos120cosx - sin120sinx

= - cos60cosx - sin60sinx

= - $\frac{1}{2}$ cosx - $\frac{\sqrt{3} }{2}$ sinx

squaring to obtain cos² (120 + x)

= $\frac{1}{4}$ cos²x + $\frac{\sqrt{3} }{2}$ sinxcosx + $\frac{3}{4}$ sin²x

--------------------------------------------------------------------

cos(120 - x) = cos120cosx + sin120sinx

= -cos60cosx + sin60sinx

= - $\frac{1}{2}$ cosx + $\frac{\sqrt{3} }{2}$ sinx

squaring to obtain cos²(120 - x)

= $\frac{1}{4}$ cos²x - $\frac{\sqrt{3} }{2}$ sinxcosx + $\frac{3}{4}$ sin²x

--------------------------------------------------------------------------

Putting it all together

cos²x + $\frac{1}{4}$ cos²x + $\frac{\sqrt{3} }{2}$ sinxcosx + $\frac{3}{4}$ sin²x + $\frac{1}{4}$ cos²x - $\frac{\sqrt{3} }{2}$ sinxcosx + $\frac{3}{4}$ sin²x

= cos²x + $\frac{1}{2}$ cos²x + $\frac{3}{2}$ sin²x

= $\frac{3}{2}$ cos²x + $\frac{3}{2}$ sin²x

= $\frac{3}{2}$ (cos²x + sin²x) = $\frac{3}{2}$

5 0

3 years ago

Find the LCM of 5 and 12

ValentinkaMS [17]

Answer:

it's 60

Step-by-step explanation: please brainliest?

7 0

3 years ago

Identify the percent of change as an increase or a decrease. 24 songs to 78 songs Increase Decrease Question 2 Find the percent

algol [13]

1)increase
2)225%
Thats the answers

6 0

3 years ago

Lin opened a savings account that pays 5.25% interest and deposited $5000. If she makes no deposits and no withdrawals for 3 yea

Alexxandr [17]

Answer:

$5829.57

Step-by-step explanation:

Annually compounding interest formula: $PV(1+i)^t$

5000(1+.0525)^3

5829.567266

which rounds to: 5829.57

7 0

3 years ago

Find the measure of angle b.

nika2105 [10]

Answer:

47°

Step-by-step explanation:

vertical angles are congruent

3 0

3 years ago