Images SIN A TG B

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Sin a tg b. Cos(a+b). Упрости TGA-Ctgb/cos(a+b) *COSASINB. TGA+Ctgb/cos a-b Sina SINB. Cos(a+b)=COSACOSB-SINASINB.
Cos(a+b). Упрости TGA-Ctgb/cos(a+b) *COSASINB. TGA+Ctgb/cos a-b Sina SINB. Cos(a+b)=COSACOSB-SINASINB.

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