Question about Office Equipment & Supplies

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Posted on Jan 02, 2017

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Square each side

Sin ^2 (x) + cos ^2 (x) +2 sin (x)cos (x) = 49/25

1 + 2sin (x)cos (x) = 1.960

sin (2x) = 0.960

2x = 73.74 deg

x = 36.87 deg

Sin ^2 (x) + cos ^2 (x) +2 sin (x)cos (x) = 49/25

1 + 2sin (x)cos (x) = 1.960

sin (2x) = 0.960

2x = 73.74 deg

x = 36.87 deg

Sep 07, 2014 | Computers & Internet

SOHCAHTOA.

Sine is the Opposite divided by the Hypotenuse.

Let's use a triangle with both sides equal to 1 and the hypotenuse will be a^2 + b^2 = c^2, or 1^2 + 1^2 = c^2, or c^2 = 2, so c = square root (2).

So in this triangle, the sin 45 degrees is 1/square root 2 or 0.7071.

Sin square 45 is really sin 45 squared. So we get our answer 0.7071 and square it, and we get 0.5.

Good luck.

Paul

Sine is the Opposite divided by the Hypotenuse.

Let's use a triangle with both sides equal to 1 and the hypotenuse will be a^2 + b^2 = c^2, or 1^2 + 1^2 = c^2, or c^2 = 2, so c = square root (2).

So in this triangle, the sin 45 degrees is 1/square root 2 or 0.7071.

Sin square 45 is really sin 45 squared. So we get our answer 0.7071 and square it, and we get 0.5.

Good luck.

Paul

May 01, 2014 | Sharp el-531x scientific calculator

The position of the exponent in trig functions is an anomaly in mathematical notation. While the square of sin x is commonly written as

sin^2(x) ,

the square of any other function is written as f(x) ^2 . For example, you wouldn't write ln^2(2) if you mean the square of the natural logarithm of 2, instead you write it as ln(2)^2 or (ln(2))^2 .

The calculator works the same way. To calculate the square of the sine of 3, for example, press

SIN 3 ) ^ 2 ENTER

sin^2(x) ,

the square of any other function is written as f(x) ^2 . For example, you wouldn't write ln^2(2) if you mean the square of the natural logarithm of 2, instead you write it as ln(2)^2 or (ln(2))^2 .

The calculator works the same way. To calculate the square of the sine of 3, for example, press

SIN 3 ) ^ 2 ENTER

Nov 18, 2011 | Texas Instruments Office Equipment &...

You need to enclose the whole function in parentheses, then square it. sin^2(X) shoulld be entered as sin(x)*sin(x) or (sin(X))^2

Aug 25, 2011 | Texas Instruments TI-84 Plus Calculator

Use the fact that cos(pi/4)=sin(pi/4)= 1/square root(2). Trigonometric identity cos(a+b)=cos(a)cos(b)-sin(a)sin(b).

Nov 07, 2010 | SoftMath Algebrator - Algebra Homework...

Hello,

You should know that you cannot enter something like sin^2(x) as you would by hand. So you must use parentheses:**( sin(x) )^2. **If you do that there is no ambiguity. The calculator evaluates the sine because parentheses are evaluated first, then it takes the square.

So 4[x]**[(]** [SIN]*[(] *60 *[)]* **[)] **[Xto the 2] [=] result is 3/

Since you do not say what model you use, what I entered may not be appropriate: the parentheses inside the sine function may not be needed. In the new Casio the first parenthesis inside the sine is supplied by calculator, but the closing one must be entered by the user.

Hope it helps

You should know that you cannot enter something like sin^2(x) as you would by hand. So you must use parentheses:

So 4[x]

Since you do not say what model you use, what I entered may not be appropriate: the parentheses inside the sine function may not be needed. In the new Casio the first parenthesis inside the sine is supplied by calculator, but the closing one must be entered by the user.

Hope it helps

Sep 17, 2009 | Casio Office Equipment & Supplies

cos x + root 3 sin x =root 2

cos x + ö3 * Sin x = ö2

squaring both the side

(cos x + ö3 * Sin x)2 = (ö2)2

Cos2 x + 3 * Sin2 x = 2

Cos2 x + Sin2 x + 2 * Sin2 x = 2

1 + 2 * Sin2 x= 2

2 * Sin2 x = 2-1

2 * Sin2 x = 1

Sin2 x = ½

Sin x = ö½

Sin x = 1/V2= Sin 45

X = 450

cos x + ö3 * Sin x = ö2

squaring both the side

(cos x + ö3 * Sin x)2 = (ö2)2

Cos2 x + 3 * Sin2 x = 2

Cos2 x + Sin2 x + 2 * Sin2 x = 2

1 + 2 * Sin2 x= 2

2 * Sin2 x = 2-1

2 * Sin2 x = 1

Sin2 x = ½

Sin x = ö½

Sin x = 1/V2= Sin 45

X = 450

Aug 28, 2008 | Super Tutor Trigonometry (ESDTRIG) for PC

sin^2(x+2) is the same as (sin(x+2))^2

Nov 28, 2007 | Texas Instruments TI-83 Plus Calculator

if you want to square sin(3), press:

(

sin

3

)

)

^

2

(

sin

3

)

)

^

2

Sep 24, 2007 | Texas Instruments TI-89 Calculator

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