PLEASE SOLVE THIS QUESTION

Asked by  | 5th Jun, 2008, 02:27: PM

Expert Answer:

Sin 90 = 1, Sin 45 = 1/2, cos 45 = 1/2 SIN (A+B)= SINA COS B + COS A SIN B SIN (45+45)= SIN 45 COS 45 + COS 45 SIN 45 SIN 90 = SIN 45 COS 45 + COS 45 SIN 45 1 = 1/2 x 1/2 + 1/2 x 1/2 1 = 1/2 + 1/2 1 = 1 proved

Aswered by  | 5th Jun, 2008, 05:43: PM

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