CBSE Class 10 Answered
if (sin?)(cos?) = 1, then prove that sin ? +cos ? = ?3
Asked by Renoy Gladson | 13 Jul, 2013, 03:18: PM
Expert Answer
(sin ? +cos ?)^2 = sin^2? + cos^2? + 2sin? cos?
= 1 + 2(1) (sin^2? + cos^2? = 1 and also, its given that (sin?)(cos?) = 1)
= 3
Hence, (sin ? +cos ?)^2 = 3
sin ? +cos ? = root(3)
Answered by | 13 Jul, 2013, 07:17: PM
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