Question

(cos2x)(sinx)=1

Answer 1

use the double angle formula for cos2x and get the equation in terms of only sin. you'll have a trig equation in quadraic form.

Answer 2

(1-2sin^2x)(sinx)=1

Answer 3

wow, two problems at once eh?
ok, now multiply it out.

Answer 4

(sinx)-(sin^3x)=1
(sin^3x)-sinx+1

Answer 5

hmm. looks like it's not quadratic. btw. you should have :
sinx - 2sin^3x = 1

Answer 6

so we have 2sin^3x - sinx + 1 = 0

Answer 7

yes i just fogot the 2.

Answer 8

can you factor this?