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    Could somebody tell me how to do questions 7a-d. Hope you can see the photo. It is on trigonometry, compound and double angle formulas?
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    (Original post by MB98)
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    Could somebody tell me how to do questions 7a-d. Hope you can see the photo. It is on trigonometry, compound and double angle formulas?
    a) Turn it into an equation about tan 2 theta. Do not start using a double angle formula.

    b) Use the sin 2 theta formula.

    c) Use the appropriate cos 2 theta formula (you want it in terms of cos theta).

    d) Write cosec x as 1/(sin x) and then get rid of the fractions.
 
 
 
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Updated: October 22, 2015
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