Math, asked by rajesj0580, 2 months ago

without using t-table prove the following 2(sin 42° sec 48°)-1/2(cos 42°cosec48°)=3/2​

Answers

Answered by vijaypawar7321
1

SOLUTION

sin 42° sec 48° + cos 42° cos ec48° = 2

consider sin42° sec48° + cos42° cosec48°

- sin42° sec(90° - 42°) + cos42°

cosec(90° - 42°)

→ sin42° cosec42° + cos42° sec42°

sin42°,

- 1+ 1 = 2

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