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| 1. |
If sinA =20/29 and cosA = 21/29 Find sinA^2 + cosA^2 And cosA^2 - sinA^2 |
| Answer» Sin^2 + Cos^2 => (20/29)^2 + (21/29)^2 => 400/841 + 441/841 => 841/841 => 1. Cos^2 - sin^2 => (21/29)^2 - (20/29)^2 => 441/841 - 400/841 => 41/841.. | |