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∆ DEF is right angle at E. if m∠F = 300 Then Find the value of $$\left( cos D - {1\over 2}\right)$$ = ?
5Q:
∆ DEF is right angle at E. if m∠F = 300 Then Find the value of $$\left( cos D - {1\over 2}\right)$$ = ?
- 1$$-{1\over2}$$false
- 2$${{6}- \sqrt{1}}\over 3 $$false
- 3$${\sqrt{2}- 2}\over 2\sqrt{2} $$true
- 4$${\sqrt{2}- 2} $$false
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