Wednesday

April 16, 2014

April 16, 2014

Posted by **just** on Tuesday, March 27, 2007 at 9:36pm.

this is what i did please check.

i multipied both binomials. but i get cos square x..and sincosx ..how do i combine them..please help!

In this case, after multiplying binomials, there will be 24sincos and -24sincos terms that cancel. That will leave you with sin^2 and cos^2 terms. Write sin^2 as 1-cos^2 and solve for cosx

i get 9cos^2x + 16sin^2x +16cos^2x + 9sin^2x

now i know that sin^2 equals 1-cos^2....so would that be 9cos^2x + 17-cos^2x+16cos^2+ 10cos^2x? if not please help..and if this is correct..what would come after this step?

**Related Questions**

precal! - Prove: (3cosx + 4sinx)^2 + (4cosx - 3sinx)^2=5 ...this is all under ...

Algebra 1B - I really need help with this but I'm not sure if I'm going to put ...

Algebra - Rationalize each expression by building perfect nth root factors for ...

Algebra-Please help-I'm desperate to understand - Posted by Megan on Tuesday, ...

calculus please help me - Let f(x)=9sinx/2sinx+4cosx. Then 'f(x)= ((2sinx+4cosx...

Math simplifying mixed radicals - Please help me simplify these following mixed ...

Math simplifying mixed radicals - Please help me simplify these following mixed...

Calculus exam review, PLEASE HELP!! - for each function, determine the equation ...

Math Please Check It - (2sqrtx)(5sqrtx^3) Here is what I got:10sqrtx^4 *Is this ...

Pre Calculus - Prove that 2/square root 3cosx-sinx=sec(pi/6-x)