Question

9. i) If - 1/2 <O< t and cos 0 = -5/13 then find the value of sin 20.
ta
ii) If 0 <A <TT/4 and cos A = 4/5 then find the values of sin 24 and cos 2A.
iii) If 1/2 <a< it and sin a = 3/5 then find the values of tan 2a and cos 3a.​

Answer 1

Answer:

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