117k views
4 votes
If cos x= sin(20 + x)° and 0° < x < 90°, the value of xis

1 Answer

10 votes

Answer:

draw a right angle triangle

Explanation:

Let one of the angles be A

cos A = sin (90-A)

90 - x - 20 = x

2x = 70

x = 35 degrees

User Austaras
by
7.1k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.