Friday
May 24, 2013

# Posts by ALISON

Total # Posts: 259

trig
suppose theta is in the interval (90,180 degrees) find the sign of csc(-theta) is it positive or negative = positive???

trig
use a calculator to find the decimal approx. (roud 8decimal places) : sec28°6' does it equal 1.13362379 or 87.99624264 ???

I believe you are trying to factor the polynomial. so x^2 -4x+3 (x-1)(x-3) =0 x= 1,3

trig
the length of the base of an isosceles triangle is 30.42 inches. each base is 26.54 degrees. find the length of the two equal sides of the triangle to the nearest hundredths. i get 15.19. is that right?

trig
find all values of theta in the interval (0,360) that have the given value: sintheta= √2 ______ 2

maths
i think 4.631 or 4.6309 depending on sig figs.

math
For Calculating Percentages: You can for example change 4.89 to .00489 % by moving the decimal two places. or for science we usually divide the part of mass/ the whole and times it by 100 to get percentages. Calculating ratios: you can set up a proportion by.. x/30 = 1/3 and c...

Trig
find the exact values of the six trig functions of angle... sin(-315degrees) how do i do this?

Trig
assume A= alpha using complementary rule how do I solve for alpha? cos(2A+40) =sin(3A-60) I don't understand how to start the question. What are the steps in solving for alpha. Do i get cos to equal sin somehow?

CHEMISTRY:))))
A rock is 5.0% by mass fayolite(Fe2SiO4), 7.0% by mass forsterite(Mg2SiO4) and the remainder silicon dioxide. What is the mass percent of each element in the rock? I have the answers but i don't know how to solve the problem. How would you in steps solve the problem?

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