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1.) If cos (40+x) = sin30, find x. 2.)If sec 2 theta (1+sin theta ) (1-sin theta) = k, find k.

1.) If cos (40+x) = sin30, find x.
2.)If sectheta (1+sin theta ) (1-sin theta) = k, find k.
 

Grade:10

1 Answers

Ns
11 Points
4 years ago
1 = ....x = 20 .....as Cos(40+x)= sin(90-(40+x))Therefore ........Sin(90-40-x) =sin 30=>50-x=30Therefore x = 20

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