Express trig ratios given quadrant/obtuse constraint

Questions that specify an angle lies in a particular quadrant or is obtuse/reflex and ask to express other trig ratios (sin, cos, tan) in terms of a given one, using sign rules for that quadrant.

2 questions · Moderate -0.8

1.05j Trigonometric identities: tan=sin/cos and sin^2+cos^2=1

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OCR MEI C2 2005 June Q3

3 marks Moderate -0.8

3 Given that \(\sin \theta = \frac { \sqrt { 3 } } { 4 }\), find in surd form the possible values of \(\cos \theta\).

OCR MEI C2 Q1

3 marks Moderate -0.8

1 Given that \(\sin \theta = \frac { \sqrt { 3 } } { 4 }\), find in surd form the possible values of \(\cos \theta\).