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junior college 2 | H3 Maths
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Given that theta is an obtuse angle measured in radians and that sin theta = k, find, in terms of k, an expression for
(i) cos theta
(ii) tan theta
(iii) sin (theta + pi)
Date Posted: 7 years ago
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θ is obtuse , sin θ = k
(i) cos θ = −√(1 – k²)
(ii) tan θ = (sin θ) / (cos θ)
tan θ = −k / √(1 – k²)
(iii) sin (θ + π) = −k
(i) cos θ = −√(1 – k²)
(ii) tan θ = (sin θ) / (cos θ)
tan θ = −k / √(1 – k²)
(iii) sin (θ + π) = −k
Date Posted:
7 years ago
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