How do I solve the trigonometry problems
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How do I solve the trigonometry problems

[From: ] [author: ] [Date: 12-04-10] [Hit: ]
1. Express sin 64° in terms of 27° and 37°. Do not evaluate.2. Calculate cos 27° to one decimal place and use it to find cos 10°.3.......
Use the following values to answer the questions:
sin 37°=0.6, cos 37°=0.8, and sin 27°=0.45

1. Express sin 64° in terms of 27° and 37°. Do not evaluate.

2. Calculate cos 27° to one decimal place and use it to find cos 10°.

3. Calculate sin 74° using a double angle formula.

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1) 64 = 27 + 37

2) cos27 = sqrt(1 - 0.45^2)

3) sin(74) = sin(2*37) = 2sin37cos37

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one of those fancy calculators
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