Question 1: Find tan 135Â° without using a calculator. Solution: tan 135Â° = tan(90Â° + 45Â°) = tan((1 Ã— 90Â°) + 45Â°) = -cot 45Â° = -1. Explanation As here too, an odd coefficient of 90Â° is

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How do you find the value of sine when given cosine and tangent? Tangent = sine/cosine sin Î˜ = cos Î˜ Â· tan Î˜ = cos Î˜ Â· sin Î˜/cos Î˜ = sin Î˜ Multiplying the cosine by the tangent will give you