Exact value proofs

Prove exact values of trigonometric functions (e.g., sin 60° = √3/2) using geometric arguments.

1 questions · Easy -1.2

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OCR MEI C2 Q2

2 marks Easy -1.2

Use an isosceles right-angled triangle to show that \(\cos 45° = \frac{1}{\sqrt{2}}\). [2]