Assertion (A): cos20° - sin20° > 0
Reason (R): If theta belongs to R , cos theta - sin theta > 0
a) Both A and R are correct and R is correct explanation of A
b) Both A and R are correct and R is not correct explanation of A
c) A is correct, R is incorrect
d) A is incorrect, R is correct
Answers
Answered by
1
Answer:
Step-by-step explanation:
Multiplying by r, the given equation become r
2
=∣rcosθ∣ ...(1)
In Cartesian form equation (1) can be written as x
2
+y
2
=∣x∣
⇒x
2
+y
2
=+x if x>0
and x
2
+y
2
=−x if x<0
Equation (2) represents a circle of radius
2
1
and centered at (
2
1
,0).
Equation (3) represents a circle of radius
2
1
and centered at (−
2
1
,0).
Hence, the given equation represents two circles touching each other at the origin.
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