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secondary 3 | E Maths
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Help question 1a
Date Posted: 5 years ago
Views: 518
Is this question from an e maths book or an a maths book?
If e maths, this is all you need to know:
sin (180 - x) = sin x
cos (180 - x) = - cos x
tan (180 - x) = - tan x
So for example, sin 110 = sin (180 - 70) = sin 70. This 70 is the acute angle.
If e maths, this is all you need to know:
sin (180 - x) = sin x
cos (180 - x) = - cos x
tan (180 - x) = - tan x
So for example, sin 110 = sin (180 - 70) = sin 70. This 70 is the acute angle.
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Since angle 110 lies on the 2nd quadrant, the trigo ratio is sin(180-110)
Date Posted:
5 years ago
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