Using the compound angle identities, show that question help Watch

username1393226
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#1
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#1
Could someone help me with the following questions, not really too sure how to approach this and would love it if someone could help me then check my answer please




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the bear
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#2
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#2
use the expansions for

sin(a - b)

cos(a - b)

tan(a - b)

then put in values for the (radian) angles & simplify
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Hasufel
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 \sin(A-B)= \sin A \cos B - \cos A \sin B

\cos(A-B)= \cos A \cos B+\sin A \sin B

tan(...) = cos(...)/sin(....)
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the bear
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#4
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q4 here :

http://home.windstream.net/okrebs/page102.html
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Hasufel
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#5
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#5
S**t! forgot those!...
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Hasufel
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#6
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#6
might find this useful:
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