Math, asked by cristianoltu5575, 1 day ago

2 cos 78degrees . Sin 42degrees

Answers

Answered by shaileshkumar0520
0

Answer:

Step-by-step explanation:

2cosAsinB

sin(A+B)-sin(A-B)

sin(78°+42°)-sin(78°-42°)

sin120°-sin36°

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