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2cos^2(x) = 13sinx - 5
2cos^2(x) = 13sinx - 5
How do i solve for x? I think i have to use the sin^2x + cos^2x = 1, but I'm not sure how to use that. I
2 answers
asked by
Savannah
1,152 views
cosA= 5/9 find cos1/2A
are you familiar with the half-angle formulas? the one I would use here is cos A = 2cos^2 (1/2)A - 1 5/9 +
0 answers
asked by
Anonymous
817 views
What am I doing wrong?
Equation: sin2x = 2cos2x Answers: 90 and 270 .... My Work: 2sin(x)cos(x) = 2cos(2x) sin(x) cos(x) =
1 answer
asked by
Anonymous
975 views
how does 2cos(2x)-2cos(x)sin(x) becomes 2cos(2x)-sin(2x)? Try to explain each step simply.
1 answer
72 views
Determine the solution of the equetion: 2cos x-1=0? 2cos x=0? and 2cos x+1=0?
3 answers
asked by
Miley
498 views
solve 12cos^2X=8+13sinX between the window of -360 ¡Ü x ¡Ü 360
4 answers
asked by
kelly
557 views
If 13sinx+5=0 and x�[0;270],determine witout the use of a calculator,the value of sin2x
2 answers
asked by
Zinhle
450 views
Identify the equation for the following graph: (1 point) Responses y=2cos(2x) y is equal to 2 cosine 2 x y=−2cos(2x) y is
1 answer
93 views
Multiply then use fundamental identities to simplify the expression below and determine which of the following is not equivalent
1 answer
asked by
Tristian
1,674 views
Which cosine function has maximum of 2, a minimum of -2, and a period of 2pi/3?
Choose from answers below, correct one please. y
1 answer
47 views