Watch comprehensive video reviews for most units, designed for final exam preparation. Each video includes integrated problems you can solve alongside detailed solutions.
Not your average video:
Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.
Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.
Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.
Not your average video:
Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.
Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.
Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.
2D & 3D Geometry
Watch comprehensive video reviews for 2D & 3D Geometry, designed for final exam preparation. Each video includes integrated problems you can solve alongside detailed solutions.
Not your average video:
Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.
Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.
Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.
Not your average video:
Interactive Problems: Solve problems alongside the video with step-by-step guidance and detailed solutions.
Exam Preparation: Complete unit reviews designed for final exam preparation with all key concepts covered systematically.
Expert Teaching: High-quality instruction from Perplex co-founder James Mullen with clear explanations, worked examples, and exam tips.
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SL Core 3.2
The cosine rule is a generalization of Pythagoras' theorem for non-right-angled triangles. It states that
The cosine rule is primary used when we
know two sides and the angle between them, and want to find the third side,
know all three sides and want to find an angle.
Example
Triangle ABC has [AB]=3, [BC]=4 and [AC]=5. Find the angle C.
The angle C is between the sides [BC] and [AC] so
SL Core 3.2
The cosine rule is a generalization of Pythagoras' theorem for non-right-angled triangles. It states that
The cosine rule is primary used when we
know two sides and the angle between them, and want to find the third side,
know all three sides and want to find an angle.
Example
Triangle ABC has [AB]=3, [BC]=4 and [AC]=5. Find the angle C.
The angle C is between the sides [BC] and [AC] so