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cos 45°sec 30° + cosec 30

Question

cos 45°sec 30° + cosec 30

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Solution

Sure, let's solve this step by step:

  1. First, we need to know the values of cos 45°, sec 30°, and cosec 30°.

  2. The value of cos 45° is √2/2 or 0.7071.

  3. The value of sec 30° is 2/√3 or 1.1547. Sec is the reciprocal of cos, so sec 30° = 1/cos 30°.

  4. The value of cosec 30° is 2. Cosec is the reciprocal of sin, so cosec 30° = 1/sin 30°.

  5. Now, substitute these values into the equation:

    cos 45°sec 30° + cosec 30° = (√2/2 * 2/√3) + 2

  6. Simplify the equation:

    = (√2/√3) + 2

  7. To make it easier, rationalize the denominator:

    = (√2*√3/3) + 2

    = √6/3 + 2

  8. Convert 2 into a fraction with 3 as the denominator:

    = √6/3 + 6/3

  9. Add the fractions:

    = (√6 + 6)/3

So, cos 45°sec 30° + cosec 30° = (√6 + 6)/3.

This problem has been solved

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