Math, asked by vinayakdwivedi976, 6 months ago

देश : निम्नलिखित प्रत्येक का मान ज्ञात कीजिए :
(a) sin 42° . sin 12° + cos 42° . cos 12°
०००

Answers

Answered by Anonymous

4

Answer:

Solution :

यहाँ

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Step-by-step explanation:

=

1

cos

55

∘

⋅

cos

55

∘

+

sin

55

∘

⋅

1

sin

55

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