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If 4sin^2theta=1, then the values of the...

If `4sin^2theta=1,` then the values of `theta` are `2npi+-pi/3,\ n in Z` b. `npi+-pi/3,\ n in Z` c. `npi+-pi/6,\ n in Z` d. `2npi+-pi/6,\ n in Z`

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`4sin^2theta=1 `
​ ⇒`sin^2theta=1/4​ `
​ ⇒`sintheta=1/2​ or −1/2​`
​ So, the values of `theta` are` (π)/6​,(5π)/6​,(7pi)/6​ and (11π)/6`
​ So,` theta` takes 4 values.
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