The exact value of cos(105°) is_____ Simplify your answer including any radicals use integers or fractions for any numbers in the expression rationalized all denominators
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Specifically, 105° = 60° + 45°. Show more…
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The exact value of cos(105°) is _____ (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Rationalize all denominators.)
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Use a half-angle formula to find the exact value of the following expression. tan 105° Determine an appropriate half-angle formula for sine and the measure of the angle. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal.) A. tan 105° = (1 + cos ◻°) / (sin ◻°) B. tan 105° = (1 + sin ◻°) / (cos ◻°) C. tan 105° = (1 - sin ◻°) / (cos ◻°) D. tan 105° = (1 - cos ◻°) / (sin ◻°) tan 105° = ◻ (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression. Rationalize the denominator.)
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