# Posts by Sira

Total # Posts: 16

**Trigonometry**

How do I evaluate the trigonometric functions of the quadratic angle? Thanks in advance 1) sec π 2) tan π 3) cos π For this problem, I don't understand why it's -1 4) csc π 5) sec 3π/2

*January 10, 2013*

**Trigonometry**

How am I suppose to transform the left side of the equation into the right side using trig identities? ): 1) sin^2θ - cos^2θ = 2 sin^2θ - 1

*January 10, 2013*

**pre-calc**

How do I find all the real zeros of the polynomial function of these 3 ? ): 1) g(t) = 1/2t^4-1/2 2) g(t) = t^5-6t^3+9t 3) f(x) = 5x^4+15x^2+10

*October 17, 2012*

**Chemistry**

Hi I need with with a prelab calculation for a Hydrate Crystal lab and I am so confused @_@ You don't really need to solve it if you don't want to, I just need an example on how to do these problems 1) Find the mass of the water that evaporated upon heating - Mass of ...

*October 11, 2012*

**Math**

How do I find (a) f*g (b) g*f (c) f*f of these problems? If you can, please show me step by step ^___^ thank you 1)f(x)=x^2 2) f(x)=3x+5

*September 30, 2012*

**Algebra**

How do I find the domain and range of the functions? 1. f(x)=2/3x - 4 2. f(x)= x^3-3x+2 3. f(x)= 1/2 l x-2 l 4. f(x)= l x-1 l / x-1

*September 26, 2012*

**Algebra 2**

If log(base10)of 2 =0.301 and log(base10) of 3 = 0.477, how would I find a) log(base10) of 8 b) log(base10) of 12 c) log(base10) of 15

*May 9, 2012*

**Alg2**

Find a quadratic equation with integral coefficients having roots 1/2 and -5/2.

*May 9, 2012*

**Algebra 2**

What would be the simplest way to eliminate one of the variables? Below is a system of three equations in three variables: 1. x+y+3z=7 2. 2x-4y+z=7 3. 3x+5y-4z=-6

*May 8, 2012*

**Algebra 2**

How many points of intersection are there for x-y=2 and x^2+y^2=25 ?

*May 8, 2012*

**Alg2**

Solve the system for z. 2x - y + 2z = 11 x - 2y - 3z = -5 -3x + z = -3

*May 8, 2012*

**Algebra 2**

Actually wait, don't tell me. I can do this one ^^

*May 7, 2012*

**Algebra 2**

Write the function which defines a parabola with vertex (2,-3) and axis x=2

*May 7, 2012*

**Algebra 2**

If P(x) is a polynomial in x for which P(3)=0, then..? a) x-3 is a factor of P(x) b) x+3 is a factor of P(x) c) 3x is a factor of P(x) d) x^3 is a factor of P(x)

*May 7, 2012*

**Algebra 2**

Which of the following is a facator of 4by-3bz+8dy-6dz? a)4by-3bz b)b+d c)4y-3z d)4b+3d

*May 7, 2012*

**Algebra 2**

( ∛3x+5 ) + 4 = 0

*May 7, 2012*

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