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common identity tri.
30-60-90 triangle & 45-45-90 triangle identities
Question | Answer |
---|---|
sin 30 | 1/2 |
sin 45 | √2/2 |
sin 60 | √3/2 |
cos 30 | √3/2 |
cos 45 | √2/2 |
cos 60 | 1/2 |
tan 30 | √3/3 |
tan 45 | 1 |
tan 60 | √3 |
csc 30 | 2 |
csc 45 | √2 |
csc 60 | 2√3/3 |
sec 30 | 2√3/3 |
sec 45 | √2 |
sec 60 | 2 |
cot 30 | √3 |
cot 45 | 1 |
cot 60 | √3/3 |