# math

Can anyone help w/ these.

1) Solve the equation in the internal [0deg, 360deg].

a) sin 2x = -sin x

b) sin 2T = -1/2 (where T is angle)

c) 4 sin^2T = 3

2) Evaluate the expression.

sin(arctan 2)

3) Rewrite the following w/o using trigonometric or inverse tirgonometric functions.

cos(arcsin u)

In a use the double angle formula: Sin2X= 2sinXcosX

When you divide through by sinX, be certain to remember to test to see if X=0 is a solution also.

In b, solve for 2T (then divide it by two).

in C, take the square root of each side, solve for sinT, and then T.

in 2, remember solve for arcTan2, then what is the sine of that?

In 3, remember that if sine = u, then cos of the complementary angle is u.

1. 👍 0
2. 👎 0
3. 👁 131
asked by chyrl

## Similar Questions

1. ### 12th grade Trigonometry

Solve this trigonometric equation.give all positive values of the angle between 0deg and 360deg that will satisfy. Give any approximate value to the nearest minute only. 3 sin theta - 4 cos theta = 2

asked by anon on March 4, 2011
2. ### Trigonometry

I really need help with this trigonometry question.please any help is appreciated. 1.I have to draw the graph of y=cos x from 0deg to 360deg. 2.Be sure to show a table of vales similar to the this table. colum X l colum :y=sinx 0

asked by anon on March 7, 2011
3. ### math-Trig

1. Write the algebraic expression which shows Cos((ArcSin(4/X)), 2. Angle If Csc(-Θ)=15/4? 2. - what quadrant is it in, find the sin(-Θ), Sin(Θ), Tan(90deg-Θ), Tan(Θ), csc(Θ), Sec(-Θ+360deg), Thanks

asked by Alex on March 15, 2009
4. ### Math-Trig

Trig Questions- 1. Write the algebraic expression which shows Cos((ArcSin(4/X)), 2. Angle If Csc(-Θ)=15/4? 2. - what quadrant is it in, find the sin(-Θ), Sin(Θ), Tan(90deg-Θ), Tan(Θ), csc(Θ), Sec(-Θ+360deg), Thanks

asked by Ram on March 15, 2009
5. ### Precalculs

I have no idea how to do these type of problems. -------Problem-------- Solve each equation on the interval 0 less than or equal to theta less than 2 pi 42. SQRT(3) sin theta + cos theta = 1 ---------------------- There is an

asked by Kate on February 28, 2010
6. ### Trigonometry

Solve the equation for solutions in the interval 0

asked by Renee on March 7, 2016
7. ### math

Eliminate the parameter (What does that mean?) and write a rectangular equation for (could it be [t^2 + 3][2t]?) x= t^2 + 3 y = 2t Without a calculator (how can I do that?), determine the exact value of each expression. cos(Sin^-1

asked by Anonymous on August 3, 2007
8. ### Calc

how do I solve this arcsin(4/5) note that I am not looking for about 53 degrees I believe I'm suppose to solve euler's formula for x i.e. sin (x) = (e^(ix) - e^(-ix))/(2i) where x is in radians hence I would do something like this

asked by Kate on July 20, 2010
9. ### math

What are the equation on these 1. Determine the amplitude of y = -16 cos (x) 2. Determine the amplitude of = -sin (x) 3. Determine the domain of = -5 cos (x) 4. Determine the range of y = -10 sin (x) 5. Determine the period of y =

asked by Bernice on December 17, 2009
10. ### trig

2. Determine the amplitude of: y= cos x 3. Determine the domain of: y= 4 sin x 4. Determine the range of: y= - sin x 5. Determine the period of: y= 3 sin ðx 6. Determine the phase shift of: y= 3 cos (2x -1) 7. Solve the following

asked by Bernice on December 17, 2009

More Similar Questions