Math, asked by shivam5822, 1 year ago

sin15. sin25. sin30.sec65 .sec75 =1÷2

Answers

Answered by ask2109

1

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Answered by nandanaprajith9

0

Answer:

Step-by-step explanation:

LHS=

sin 15*sec75*sin25*sec65*sin30

= sin(90-75)*sec75*sin(90-65)*sec65*sin30

= cos75*sec75*cos65*sec65*sin30

=1*1*1/2

=1/2

LHS = RHS

Hence proved

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