Math, asked by saxenakabeer2904, 11 months ago

sin 18 sin 42 sin 78 cosec 54

Answers

Answered by bharath0719

6

Step-by-step explanation:

sin78-sin18+sin30-sin42=sin78-sin42-sin18+sin30=2cos(120/2)* sin18-sin18+sin30=2* 1/2*sin18-sin18+sin30=sin18-sin18+1/2

=1/2

Answered by pritambhunia49

1

Step-by-step explanation:

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