23 May 2021 Sergiu Funieru tan 2a (formula and example) (tangent of double angle) 0 0 Continue reading
22 May 2021 Sergiu Funieru cos 2a (formula and example) (cosine of double angle) 0 0 Continue reading
20 May 2021 Sergiu Funieru tan (a – b) (formula and example) (tangent of difference) 0 0 Continue reading
18 May 2021 Sergiu Funieru cos (a – b) (formula and example) (cosine of difference) 0 0 Continue reading
17 May 2021 Sergiu Funieru sin (a – b) (formula and example) (sine of difference) 0 0 Continue reading
