Evaluate 2 tan 2 30 + cos2 19 + cos2 71
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Answer:
the value of 2 tan2 30° + cos2 19° + cos2 71° is 5/3
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Step-by-step explanation:
2tan²30+cos²19+cos²71
=2×1/3+cos²(90-71)+cos²71
=2/3+sin²71+cos²71
=2/3+1
=2+3/3
=5/3
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