Question

show that cos (60⁰+30⁰)=cos60⁰.cos30⁰-sin60⁰sin30⁰​

Answer 1

Answer:

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Step-by-step explanation:

LHS-:

cos(60+30)=cos(90)

cos(90)=0

RHS-:

cos(60)*cos(30)-sin(60)*sin(30)

=1/2*√3/2 - √3/2*1/2

=√3/4-√3/4

=0

So, LHS=RHS

Hence Proved!!