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secondary 4 | A Maths
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Hi! Please help
Date Posted: 1 year ago
Views: 153
Gotta convert 10 sin x cos x to 5 sin 2x.
You will get sin 2x = -3/5.
Basic reference angle ALPHA: sininv 3/5
2x lies in the third and fourth quadrants.
2x = pi + ALPHA, 2pi - ALPHA, 3pi + ALPHA, 4pi - ALPHA, …
Search for the largest possible value of 2x that is under 6 radians.
You will get sin 2x = -3/5.
Basic reference angle ALPHA: sininv 3/5
2x lies in the third and fourth quadrants.
2x = pi + ALPHA, 2pi - ALPHA, 3pi + ALPHA, 4pi - ALPHA, …
Search for the largest possible value of 2x that is under 6 radians.
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Date Posted:
1 year ago
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