7cos270º + 12tan0º + 2csc90º - 8sec180º =
7((0) + 12(0) + 2(1/Sin90) - 8(1/Cos180)
0 + 0 + 2(1/1) - 8(1/-1)
0 + 0 + 2 + 8
10
Need to know the unit circle for this one. First switch the trig to radians. (180 degrees = pi)
csc = 1/sin and sec = 1/cos
7cos(3pi/2) + 12tan(0) + 2/(sin(pi/2)) - 8/(cos(pi))
If you dont know the unit circle, you can graph y = cos x and search for cos(270) or cos(3pi/2) on radian mode to find these values.
cos(3pi/2) = 0
tan(0) = 0
sin(pi/2) = 1
cos(pi) = -1
0 + 0 + 2/(1) - 8/(-1)
2 - (-8)
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Verified answer
7cos270º + 12tan0º + 2csc90º - 8sec180º =
7((0) + 12(0) + 2(1/Sin90) - 8(1/Cos180)
0 + 0 + 2(1/1) - 8(1/-1)
0 + 0 + 2 + 8
10
Need to know the unit circle for this one. First switch the trig to radians. (180 degrees = pi)
csc = 1/sin and sec = 1/cos
7cos(3pi/2) + 12tan(0) + 2/(sin(pi/2)) - 8/(cos(pi))
If you dont know the unit circle, you can graph y = cos x and search for cos(270) or cos(3pi/2) on radian mode to find these values.
cos(3pi/2) = 0
tan(0) = 0
sin(pi/2) = 1
cos(pi) = -1
0 + 0 + 2/(1) - 8/(-1)
2 - (-8)
10