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प्रश्न
`[(2sin 30° ,- 2 cos 60°),(- cot 45° , sin 90°)]`
`[(tan 45° , sec 60°),("cosec" 30° , cos 0°)]`
उत्तर
`[(2sin 30° ,- 2 cos 60°),(- cot 45° , sin 90°)]`
`[(tan 45° , sec 60°),("cosec" 30° , cos 0°)]`
= `[2 xx 1/2 - 2 xx 1/2] [(1, 2),(2, 1)]`
= `[(1, 1),(-1, 1)][(1, 2),(2, 1)] = [(-1 , 1),(1, -1)]`
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