COS

Express sin 67° + cos 75° in terms of trigonometric ratios of angles between 0 and 45°

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8.5 Trigonometric Identities

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Step-by-step explanation:

Trigonometry can be hard sometimes. But if u look at it from a different perspective it will be easy. Simplyfiy it.

The question is to change it to males between 0 and45 degree.

So we use complementary angle formula on both sin and cos.

This way we could reduce its angle.