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The value of sin 60° cos 30° + sin 30° cos 60° is: (a)o (b)1 (c)2 (d)4 |
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Answer» Answer: Use sin(90 ∘ −θ)=cosθ and COS(90 ∘ −θ)=sinθ and cos θ+sin 2 θ=1 Step-by-step explanation: sin30 ∘ ⋅cos60 ∘ +cos30 ∘ ∘
=sin(90 ∘ −60 ∘ )⋅cos60 ∘ +cos(90 ∘ −60 ∘ )⋅sin60 ∘
=cos60 ∘ ⋅cos60 ∘ +sin60 ∘ ⋅sin60 ∘
=cos 2 60°+sin 2 60°=1 mark me as the brainlist |
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