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Sine Rule - Unknown Angles * To find an angle, we put the angles on top. * We need to pairs of opposite sides/angles to apply the rule. Sine Rule - Unknown Angles Step 1: Input matching angles and sides, starting with the unknown angle. sin θ = sin o Sine Rule - Unknown Angles sin θ = Step 2: Get sin θ by itself by multiplying the denominator to the other side × sin 33 9 Sine Rule - Unknown Angles sin θ = [Correct to 3 d.p. Keep the full answer on the calculator] Step 3: Input into your calculator. Sine Rule - Unknown Angles [Correct to the nearest degree] Step 4: Remove sin by using sin-1. θ = o Sine Rule - Unknown Angles sin θ No prompts this time! = sin o Sine Rule - Unknown Angles sin θ = × sin 21 21 Sine Rule - Unknown Angles [Correct to 3 d.p. Keep the full answer on the calculator] sin θ = Sine Rule - Unknown Angles [Correct to the nearest degree] θ = o |