Question

State which of the following are positive ?
(1) cos 271°
(ii)
sec 739
(iv) cosec 159 °
(v) sec 1999
(vii) cos 315º
(viii) cot 375°​

Answer 1

Answer:

tanθ=ba

sec2θ=1+tan2θ

sec2θ=ba+b

cotθ=ab

cosec2θ=1+cot2θ=aa+b

sinθsec7θ+cosθcsc7θ=tanθ(sec2θ)3+cotθ(cosec2θ)3

=ba(ba+b)3+ab(aa+b)3

=(a+b)3(

Step-by-step explanation:

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