SOLUTION: 2 Theta, given Sin theta=sq rt of 2/3 and cos of theta > 0. Find Cos of theta
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Question 1137903: 2 Theta, given Sin theta=sq rt of 2/3 and cos of theta > 0. Find Cos of theta
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
note:
Quadrant 1: All are positive
Quadrant 2: Sine is positive
Quadrant 3: Tangent is positive
Quadrant 4: Cosine is positive
given:
,theta must lie in the or quadrant
.....which it is, theta must lie in the or quadrant
common for both and is quadrant
°
=>
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