without a graphing utility
1+4sinx = 4(1 - sin^2 x)
4sin^2 x + 4sinx -3 = 0
(2sinx - 1)(2sinx + 3) = 0
sinx = 1/2 or sinx = -3/2
the last part is not possible since sinx is between -1 and +1
so sinx = 1/2
x must be in quadrants I or II
I know sin 30° = 1/2
so x = 30° or 150°
x = π/6 or x = 5π/6
Answer this Question
trig - Write an equation for simple harmonic motion, given that the amplitude ...
PRE CALC PLEASE HELP!!!!!!!! - find the solutions of the equation that are in ...
pre cal 2 - solve the equation 4cos^2x-1=0
Pre-Calculus - Solve the equation 4sin x = e^x on the interval (0, 1). Correctly...
trig - cos@-4SIN@=1 then sin@+4cos@=
math - Prove that:(3-4sin^2A) (1-3tan^2A)=(3-tan^2A)(4cos^2A-3)
Pre-Cal - Hi, can someone please solve this step-by-step for me? I really don't ...
Trigonometry - 1. 4sin^2x=3tan^2x-1 2. 8cos^2x-4cos^4x=3 3. 3secx-cosx=2
pre-calc - how do i solve this equation algebraicly solve the equation 1+25cos(x...
PRE CALCULUS - 8-12SIN^2X=4COS^2X SOLVE FOR X