Question: a Expand and simplify 1 3 b By writing 75 as 30 45 find the value of cos 75 The following diagram shows the triangle

a Expand and simplify 1 3 b By writing 75 as

a Expand and simplify 1 3 b By writing 75 as 30 45 find the value of cos 75 The following diagram shows the triangle ABC where BC 6 CA 2 and ACB 75 A 6 c Find AB in the form a b where a b e Z B 2 75

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