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secondary 4 | A Maths
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Hi. Thanks for helping. I need help with the whole of question 6. Please help. Thanks
Date Posted: 4 years ago
Views: 201
(i)
8 sin² x = 7 - 2 cos x
8(1 - cos² x) = 7 - 2 cos x
8cos² x - 2 cos x - 1 = 0
* u cont here
(ii)
4 sin ½y cos y = 3 cos y
cos y(4 sin ½y - 3) = 0
* u cont here
(b)
in radian mode
tan(2z - 0.2) = 1.2
(2z - 0.2) = 0.876, 4.017, 7.159
* u cont here
.
.
.
8 sin² x = 7 - 2 cos x
8(1 - cos² x) = 7 - 2 cos x
8cos² x - 2 cos x - 1 = 0
* u cont here
(ii)
4 sin ½y cos y = 3 cos y
cos y(4 sin ½y - 3) = 0
* u cont here
(b)
in radian mode
tan(2z - 0.2) = 1.2
(2z - 0.2) = 0.876, 4.017, 7.159
* u cont here
.
.
.
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