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Prove the following :
cos θ tan θ = sin θ
sin θ cot θ = cos θ
In figure (1) given below, ∆ABC is right-angled at B and ∆BRS is right-angled at R. If AB = 18 cm, BC = 7.5 cm, RS = 5 cm, ∠BSR = x° and ∠SAB = y°, then find :
(i) tan x°
(ii) sin y°.
