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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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tiny hobbit
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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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