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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.
Trig equations & identities
Watch comprehensive video reviews for Trig equations & identities, 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 3.6
Remember that cosθ, sinθ are the base and height of a right angled triangle whose hypotenuse is 1, we can apply Pythagoras's Theorem and conclude:
Example
Given that cosθ=−53 and π≤θ≤2π, find sinθ.
And since π≤θ≤2π, sinθ<0 so sinθ=−54.
SL 3.6
Remember that cosθ, sinθ are the base and height of a right angled triangle whose hypotenuse is 1, we can apply Pythagoras's Theorem and conclude:
Example
Given that cosθ=−53 and π≤θ≤2π, find sinθ.
And since π≤θ≤2π, sinθ<0 so sinθ=−54.