Math, asked by omprakashhembram, 3 months ago

Find value: cos 15⁰× cos 7½⁰× sin7½⁰

Answers

Answered by nimishjagtap02

0

Answer:

1/8

Step-by-step explanation:

cos15∘cos721∘sin721∘

=21cos15∘(2cos721∘sin721∘)

(Multiply and divide by 2)

=21cos15∘sin15∘

=41(2sin15∘cos15∘)=41(sin30∘)=41⋅21=81

Formula used: 2sinθcosθ=sin2θ

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