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please help me by solving 7, 8, and 9. these are sums from class 11 tuitions.

please help me by solving 7, 8, and 9. these are sums from class 11 tuitions.

Question Image
Grade:9

1 Answers

Harshit Singh
askIITians Faculty 5964 Points
5 months ago
Dear Student

7 . Tan x = √3 is for 60,(180+60) i.e 60 and 240 degrees
8. cos x= √3/2 is true for 30,(360-30),360+30,720-30.
9. sinx= +1/√2 or –1/√2 is true for n(pi)\pm(pi/4)


Thanks

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