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This is an Extension question, not 2 unit.hi guys, ive been struggling with this question fora quite a while, i need help really badly.
The question is:
Find the possible values of tan x if: 9cos2x + 7sin2x = 1
Oops, check my response to your question in the 2 unit forum.hi guys, ive been struggling with this question fora quite a while, i need help really badly.
The question is:
Find the possible values of tan x if: 9cos2x + 7sin2x = 11
Ok im really sorry but i did not learn how to do it that way, is there a chance you can show me by doing the t results?As stated from braintic's post: "Let u=sin2x, so cos2x=sqrt(1-u^2)"
u = sin 2x
Square both sides,
u^2 = sin^2 (2x)
u^2 = 1 - cos^2 (2x)
cos^2 (2x) = 1 - u^2
cos(2x) = sqrt{1-u^2)
Let t=tanx (tan of half the angle)hi guys, ive been struggling with this question fora quite a while, i need help really badly.
The question is:
Find the possible values of tan x if: 9cos2x + 7sin2x = 11