Given Sin (90 – a) = 1/2 , find without using tables or calculators the value of Cos a.

Given Sin (90 – a) = 1/2 , find without using tables or calculators the value of Cos a.

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Construct rectangle ABCD in which AB = 4cm and BC = 3cm. Inside the rectangle construct the locus of point L₁ which is 3 cm

In Exercises 19–24, a. Use the unit circle shown for Exercises 5

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Without using a calculator evaluate

Given Sin (90 – a) = 1/2 , find without using tables or

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Without using trigonometric tables, evaluate each of the following