3 years ago

Determine the sign of cos pi/3 without using a calculator.

1 answer:

8 0

Pi/3 is in the first quadrant, and all trigonometric functions are positive in the first quadrant,
Therefore, cos pi/3 is positive.

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ira [324]

Just do 12 times 4 this should get you 48 and thats the number

6 0

3 years ago

irina1246 [14]

Answer:

Step-by-step explanation:

...

3 0

2 years ago

Artemon [7]

So 3x3 is equal to 9 but i do not understand what you mean and multiply to 16

4 0

3 years ago

lakkis [162]

Answer:

11/10

Step-by-step explanation:

divide both the terms of 55 & 50 with 5: like this ⬇️

put it in the fraction form: ⬇️

I hope this information helps.

8 0

2 years ago

KIM [24]

Answer:

$\frac{2x^2+4x-9}{(2x-3)(2x+3)(x-1)}$

Step-by-step explanation:

$\frac{2x}{4x^2-9} + \frac{3}{2x^2+x-3}$ can be simplified to:
$\frac{2x}{(2x-3)(2x+3)}+\frac{3}{(2x+3)(x-1)}$

Make them have common denominators so:
$\frac{(2x)(x-1) +3(2x-3)}{(2x-3)(2x+3)(x-1)}$

Simplify:
$\frac{2x^2-2x+6x-9}{(2x-3)(2x+3)(x-1)} = \frac{2x^2+4x-9}{(2x-3)(2x+3)(x-1)}$

I don't think you can simplify that fraction further so that's the answer.

3 0

2 years ago